Bridge 1.5.2 Golden Gate

Release Notes * Improved package creation logic * Refactor of sending functions to simplify code maintenance * Added tests for package creation Fixed * Bridge crashes related to labels handling * GUI popup related to TLS connection error * An issue where a random session key is included in the data payload * Error handling (including improved detection)
Bridge 1.5.1 Golden Gate
2020-11-24 10:38:36 +01:00 · 2020-11-23 07:43:43 +01:00 · 2020-11-20 14:44:42 +00:00 · 2020-11-20 14:44:42 +00:00 · 2020-11-20 13:39:13 +00:00 · 2020-11-20 13:39:13 +00:00
95 changed files with 2372 additions and 1064 deletions
--- a/.gitattributes
+++ b/.gitattributes
@ -1 +1 @@
-Changelog.md merge=union
+unreleased.md merge=union
--- a/.github/ISSUE_TEMPLATE/general-issue-template.md
+++ b/.github/ISSUE_TEMPLATE/general-issue-template.md
@ -27,6 +27,9 @@ Issue tracker is ONLY used for reporting bugs with technical details. "It doesn'
 3.
 4.

+## Version Information
+<!--- Which version of the app(s) were you using when you experienced this issue? -->
+
 ## Context (Environment)
 <!--- How has this issue affected you? What are you trying to accomplish? -->
 <!--- Providing context helps us come up with a solution that is most useful in the real world -->
--- a/Changelog.md
+++ b/Changelog.md
@ -1,8 +1,55 @@
-# ProtonMail Bridge Changelog
+# ProtonMail Bridge and Import-Export app Changelog

 Changelog [format](http://keepachangelog.com/en/1.0.0/)

-## Unreleased
+## [Bridge 1.5.2] Golden Gate
+
+### Changed
+* GODT-883 Use `ClearPacket` for `text/plain` with signature
+
+
+## [Bridge 1.5.1] Golden Gate
+
+### Added
+* GODT-701 Try load messages one-by-one if IMAP server errors with batch load
+  and not interrupt the transfer.
+* GODT-878 Tests for send packet creation logic.
+
+### Changed
+* GODT-180 Updated Sentry client.
+* GODT-651 Build creates proper binary names.
+* GODT-878 Fix an issue where the random session key is inadvertently sent to
+  the Proton server. The data payload is always encrypted within TLS, but this
+  is still a potential privacy problem. Discovered by Proton's internal
+  security audit team.
+* GODT-878 Refactor and move the send packet creation logic to `pmapi.SendMessageReq`.
+* GODT-878 Encryption of session keys moved to pmapi.
+
+
+## [IE 1.2.1] Elbe
+
+### Added
+* GODT-799 Skipped messages do not change total counts but shows as separate number.
+
+## Fixed
+* GODT-799 Fix skipping unwanted folders importing from mbox files.
+* GODT-769 Close connection before deleting labels to prevent panics accessing deleted bucket.
+
+### Removed
+* GODT-766 Remove GUI popup for IMAP TLS error.
+
+
+## [Bridge 1.5.0] Golden Gate
+
+### Changed
+* Updated go-mbox dependency back to upstream.
+
+### Fixed
+* GODT-847 Waiting for unilateral update during deleting the message.
+* GODT-849 Show in error counts in the end also lost messages.
+* GODT-835 Do not include conversation ID in references to show properly conversation threads in clients.
+* GODT-685 Improve deb packaging regarding dejavu font
+

 ## [IE 1.2.0] Elbe

@ -26,6 +73,11 @@ Changelog [format](http://keepachangelog.com/en/1.0.0/)
 * GODT-827 Do not spam sentry with bad ID by integration test.
 * GODT-700 Fix UTF-7 incompatibility.
 * GODT-837 Fix flaky TestFailUnpauseAndStops.
+* GODT-782 Don't use TLS pinning when checking connectivity status.
+
+### Changed
+* TLS pins conform to official list.
+

 ## [Bridge 1.4.5] Forth

--- a/30
+++ b/30
@ -10,19 +10,21 @@ TARGET_OS?=${GOOS}
 .PHONY: build build-ie build-nogui build-ie-nogui check-has-go

 # Keep version hardcoded so app build works also without Git repository.
-BRIDGE_APP_VERSION?=1.4.5-git
-IE_APP_VERSION?=1.2.0-git
+BRIDGE_APP_VERSION?=1.5.2-git
+IE_APP_VERSION?=1.2.1-git
 APP_VERSION:=${BRIDGE_APP_VERSION}
 SRC_ICO:=logo.ico
 SRC_ICNS:=Bridge.icns
 SRC_SVG:=logo.svg
 TGT_ICNS:=Bridge.icns
+EXE_NAME:=proton-bridge
 ifeq "${TARGET_CMD}" "Import-Export"
    APP_VERSION:=${IE_APP_VERSION}
    SRC_ICO:=ie.ico
    SRC_ICNS:=ie.icns
    SRC_SVG:=ie.svg
    TGT_ICNS:=ImportExport.icns
+    EXE_NAME:=proton-ie
 endif
 REVISION:=$(shell git rev-parse --short=10 HEAD)
 BUILD_TIME:=$(shell date +%FT%T%z)
@ -40,30 +42,34 @@ BUILD_FLAGS_NOGUI+= ${GO_LDFLAGS}

 DEPLOY_DIR:=cmd/${TARGET_CMD}/deploy
 ICO_FILES:=
-EXE:=$(shell basename ${CURDIR})
-
+DIRNAME:=$(shell basename ${CURDIR})
+EXE:=${EXE_NAME}
+EXE_QT:=${DIRNAME}
 ifeq "${TARGET_OS}" "windows"
    EXE:=${EXE}.exe
+    EXE_QT:=${EXE_QT}.exe
    ICO_FILES:=${SRC_ICO} icon.rc icon_windows.syso
 endif
 ifeq "${TARGET_OS}" "darwin"
    DARWINAPP_CONTENTS:=${DEPLOY_DIR}/darwin/${EXE}.app/Contents
-    EXE:=${EXE}.app/Contents/MacOS/${EXE}
+    EXE:=${EXE}.app
+    EXE_QT:=${EXE_QT}.app
+    EXE_BINARY_DARWIN:=/Contents/MacOS/${EXE_NAME}
 endif
 EXE_TARGET:=${DEPLOY_DIR}/${TARGET_OS}/${EXE}
+EXE_QT_TARGET:=${DEPLOY_DIR}/${TARGET_OS}/${EXE_QT}

 TGZ_TARGET:=bridge_${TARGET_OS}_${REVISION}.tgz
 ifeq "${TARGET_CMD}" "Import-Export"
    TGZ_TARGET:=ie_${TARGET_OS}_${REVISION}.tgz
 endif

-
 build: ${TGZ_TARGET}
 build-ie:
 	TARGET_CMD=Import-Export $(MAKE) build

 build-nogui:
-	go build ${BUILD_FLAGS_NOGUI} -o ${TARGET_CMD} cmd/${TARGET_CMD}/main.go
+	go build ${BUILD_FLAGS_NOGUI} -o ${EXE_NAME} cmd/${TARGET_CMD}/main.go

 build-ie-nogui:
 	TARGET_CMD=Import-Export $(MAKE) build-nogui
@ -78,12 +84,16 @@ ${DEPLOY_DIR}/linux: ${EXE_TARGET}
 	cp -pf ./Changelog.md ${DEPLOY_DIR}/linux/

 ${DEPLOY_DIR}/darwin: ${EXE_TARGET}
+	if [ "${DIRNAME}" != "${EXE_NAME}" ]; then \
+		mv ${EXE_TARGET}/Contents/MacOS/{${DIRNAME},${EXE_NAME}}; \
+		perl -i -pe"s/>${DIRNAME}/>${EXE_NAME}/g" ${EXE_TARGET}/Contents/Info.plist; \
+	fi
 	cp ./internal/frontend/share/icons/${SRC_ICNS} ${DARWINAPP_CONTENTS}/Resources/${TGT_ICNS}
 	cp LICENSE ${DARWINAPP_CONTENTS}/Resources/
 	rm -rf "${DARWINAPP_CONTENTS}/Frameworks/QtWebEngine.framework"
 	rm -rf "${DARWINAPP_CONTENTS}/Frameworks/QtWebView.framework"
 	rm -rf "${DARWINAPP_CONTENTS}/Frameworks/QtWebEngineCore.framework"
-	./utils/remove_non_relative_links_darwin.sh "${EXE_TARGET}"
+	./utils/remove_non_relative_links_darwin.sh "${EXE_TARGET}${EXE_BINARY_DARWIN}"

 ${DEPLOY_DIR}/windows: ${EXE_TARGET}
 	cp ./internal/frontend/share/icons/${SRC_ICO} ${DEPLOY_DIR}/windows/logo.ico
@ -101,6 +111,7 @@ ${EXE_TARGET}: check-has-go gofiles ${ICO_FILES} update-vendor
 	cp cmd/${TARGET_CMD}/main.go .
 	qtdeploy ${BUILD_FLAGS} ${QT_BUILD_TARGET}
 	mv deploy cmd/${TARGET_CMD}
+	if [ "${EXE_QT_TARGET}" != "${EXE_TARGET}" ]; then mv ${EXE_QT_TARGET} ${EXE_TARGET}; fi
 	rm -rf ${TARGET_OS} main.go

 logo.ico ie.ico: ./internal/frontend/share/icons/${SRC_ICO}
@ -197,7 +208,7 @@ coverage: test

 mocks:
 	mockgen --package mocks github.com/ProtonMail/proton-bridge/internal/users Configer,PanicHandler,ClientManager,CredentialsStorer,StoreMaker > internal/users/mocks/mocks.go
-	mockgen --package mocks github.com/ProtonMail/proton-bridge/internal/transfer PanicHandler,ClientManager > internal/transfer/mocks/mocks.go
+	mockgen --package mocks github.com/ProtonMail/proton-bridge/internal/transfer PanicHandler,ClientManager,IMAPClientProvider > internal/transfer/mocks/mocks.go
 	mockgen --package mocks github.com/ProtonMail/proton-bridge/internal/store PanicHandler,ClientManager,BridgeUser > internal/store/mocks/mocks.go
 	mockgen --package mocks github.com/ProtonMail/proton-bridge/pkg/listener Listener > internal/store/mocks/utils_mocks.go
 	mockgen --package mocks github.com/ProtonMail/proton-bridge/pkg/pmapi Client > pkg/pmapi/mocks/mocks.go
@ -265,7 +276,6 @@ run-ie-qt:
 run-ie-nogui:
 	TARGET_CMD=Import-Export $(MAKE) run-nogui

-
 clean-frontend-qt:
 	$(MAKE) -C internal/frontend/qt -f Makefile.local clean
 clean-frontend-qt-ie:
--- a/go.mod
+++ b/go.mod
@ -18,13 +18,13 @@ require (
 	github.com/ProtonMail/go-apple-mobileconfig v0.0.0-20160701194735-7ea9927a11f6
 	github.com/ProtonMail/go-autostart v0.0.0-20181114175602-c5272053443a
 	github.com/ProtonMail/go-imap-id v0.0.0-20190926060100-f94a56b9ecde
+	github.com/ProtonMail/go-rfc5322 v0.2.0
 	github.com/ProtonMail/go-vcard v0.0.0-20180326232728-33aaa0a0c8a5
 	github.com/ProtonMail/gopenpgp/v2 v2.0.1
 	github.com/PuerkitoBio/goquery v1.5.1
 	github.com/abiosoft/ishell v2.0.0+incompatible
 	github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db // indirect
 	github.com/allan-simon/go-singleinstance v0.0.0-20160830203053-79edcfdc2dfc
-	github.com/certifi/gocertifi v0.0.0-20200211180108-c7c1fbc02894 // indirect
 	github.com/chzyer/logex v1.1.10 // indirect
 	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
 	github.com/cucumber/godog v0.8.1
@ -35,14 +35,14 @@ require (
 	github.com/emersion/go-imap-quota v0.0.0-20200423100218-dcfd1b7d2b41
 	github.com/emersion/go-imap-specialuse v0.0.0-20200722111535-598ff00e4075
 	github.com/emersion/go-imap-unselect v0.0.0-20171113212723-b985794e5f26
-	github.com/emersion/go-mbox v1.0.0
+	github.com/emersion/go-mbox v1.0.2
 	github.com/emersion/go-message v0.12.1-0.20200903165315-e1abe21f389a
 	github.com/emersion/go-sasl v0.0.0-20200509203442-7bfe0ed36a21
 	github.com/emersion/go-textwrapper v0.0.0-20160606182133-d0e65e56babe
 	github.com/emersion/go-vcard v0.0.0-20190105225839-8856043f13c5 // indirect
 	github.com/fatih/color v1.9.0
 	github.com/flynn-archive/go-shlex v0.0.0-20150515145356-3f9db97f8568 // indirect
-	github.com/getsentry/raven-go v0.2.0
+	github.com/getsentry/sentry-go v0.8.0
 	github.com/go-resty/resty/v2 v2.3.0
 	github.com/golang/mock v1.4.4
 	github.com/google/go-cmp v0.5.1
@ -59,7 +59,7 @@ require (
 	github.com/nsf/jsondiff v0.0.0-20200515183724-f29ed568f4ce
 	github.com/olekukonko/tablewriter v0.0.4 // indirect
 	github.com/pkg/errors v0.9.1
-	github.com/sirupsen/logrus v1.6.0
+	github.com/sirupsen/logrus v1.7.0
 	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/stretchr/testify v1.6.1
@ -74,8 +74,7 @@ require (

 replace (
 	github.com/docker/docker-credential-helpers => github.com/ProtonMail/docker-credential-helpers v1.1.0
-	github.com/emersion/go-imap => github.com/ProtonMail/go-imap v0.0.0-20201016095853-a7520cc904d3
-	github.com/emersion/go-mbox => github.com/ProtonMail/mbox v0.0.0-20200918064939-909a18c9af45
+	github.com/emersion/go-imap => github.com/ProtonMail/go-imap v0.0.0-20201102134601-418cd74e9474
 	github.com/emersion/go-smtp => github.com/ProtonMail/go-smtp v0.0.0-20181206232543-8261df20d309
 	github.com/jameskeane/bcrypt => github.com/ProtonMail/bcrypt v0.0.0-20170924085257-7509ea014998
 	golang.org/x/crypto => github.com/ProtonMail/crypto v0.0.0-20200818122824-ed5d25e28db8
--- a/go.sum
+++ b/go.sum
@ -1,6 +1,10 @@
 github.com/0xAX/notificator v0.0.0-20191016112426-3962a5ea8da1 h1:j9HaafapDbPbGRDku6e/HRs6KBMcKHiWcm1/9Sbxnl4=
 github.com/0xAX/notificator v0.0.0-20191016112426-3962a5ea8da1/go.mod h1:NtXa9WwQsukMHZpjNakTTz0LArxvGYdPA9CjIcUSZ6s=
+github.com/AndreasBriese/bbloom v0.0.0-20190306092124-e2d15f34fcf9/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/CloudyKit/fastprinter v0.0.0-20200109182630-33d98a066a53/go.mod h1:+3IMCy2vIlbG1XG/0ggNQv0SvxCAIpPM5b1nCz56Xno=
+github.com/CloudyKit/jet/v3 v3.0.0/go.mod h1:HKQPgSJmdK8hdoAbKUUWajkHyHo4RaU5rMdUywE7VMo=
+github.com/Joker/hpp v1.0.0/go.mod h1:8x5n+M1Hp5hC0g8okX3sR3vFQwynaX/UgSOM9MeBKzY=
 github.com/Masterminds/semver/v3 v3.1.0 h1:Y2lUDsFKVRSYGojLJ1yLxSXdMmMYTYls0rCvoqmMUQk=
 github.com/Masterminds/semver/v3 v3.1.0/go.mod h1:VPu/7SZ7ePZ3QOrcuXROw5FAcLl4a0cBrbBpGY/8hQs=
 github.com/ProtonMail/bcrypt v0.0.0-20170924085257-7509ea014998 h1:YT2uVwQiRQZxCaaahwfcgTq2j3j66w00n/27gb/zubs=
@ -15,36 +19,46 @@ github.com/ProtonMail/go-apple-mobileconfig v0.0.0-20160701194735-7ea9927a11f6 h
 github.com/ProtonMail/go-apple-mobileconfig v0.0.0-20160701194735-7ea9927a11f6/go.mod h1:EtDfBMIDWmVe4viZCuBTEfe3OIIo0ghbpOaAZVO+hVg=
 github.com/ProtonMail/go-autostart v0.0.0-20181114175602-c5272053443a h1:fXK2KsfnkBV9Nh+9SKzHchYjuE9s0vI20JG1mbtEAcc=
 github.com/ProtonMail/go-autostart v0.0.0-20181114175602-c5272053443a/go.mod h1:oTGdE7/DlWIr23G0IKW3OXK9wZ5Hw1GGiaJFccTvZi4=
-github.com/ProtonMail/go-imap v0.0.0-20201016095853-a7520cc904d3 h1:Jvv9t3rSg/ID3Fh+uYsxgmvNI9fYnlab4vtBsbPtmq8=
-github.com/ProtonMail/go-imap v0.0.0-20201016095853-a7520cc904d3/go.mod h1:yKASt+C3ZiDAiCSssxg9caIckWF/JG7ZQTO7GAmvicU=
+github.com/ProtonMail/go-imap v0.0.0-20201102134601-418cd74e9474 h1:D0RwDtkBw0Gt7hmbb1ivdEulplJAwu1i2jzh4HM45fo=
+github.com/ProtonMail/go-imap v0.0.0-20201102134601-418cd74e9474/go.mod h1:yKASt+C3ZiDAiCSssxg9caIckWF/JG7ZQTO7GAmvicU=
 github.com/ProtonMail/go-imap-id v0.0.0-20190926060100-f94a56b9ecde h1:5koQozTDELymYOyFbQ/VSubexAEXzDR8qGM5mO8GRdw=
 github.com/ProtonMail/go-imap-id v0.0.0-20190926060100-f94a56b9ecde/go.mod h1:795VPXcRUIQ9JyMNHP4el582VokQfippgjkQP3Gk0r0=
 github.com/ProtonMail/go-mime v0.0.0-20190923161245-9b5a4261663a h1:W6RrgN/sTxg1msqzFFb+G80MFmpjMw61IU+slm+wln4=
 github.com/ProtonMail/go-mime v0.0.0-20190923161245-9b5a4261663a/go.mod h1:NYt+V3/4rEeDuaev/zw1zCq8uqVEuPHzDPo3OZrlGJ4=
+github.com/ProtonMail/go-rfc5322 v0.2.0 h1:tndoDGFtiCvESta9KLUeMksojz8qf76PefnkoQ+fqeg=
+github.com/ProtonMail/go-rfc5322 v0.2.0/go.mod h1:mzZWlMWnQJuYLL7JpzuPF5+FimV2lZ9f0jeq24kJjpU=
 github.com/ProtonMail/go-smtp v0.0.0-20181206232543-8261df20d309 h1:2pzfKjhBjSnw3BgmfTYRFQr1rFGxhfhUY0KKkg+RYxE=
 github.com/ProtonMail/go-smtp v0.0.0-20181206232543-8261df20d309/go.mod h1:6UoBvDAMA/cTBwS3Y7tGpKnY5RH1F1uYHschT6eqAkI=
 github.com/ProtonMail/go-vcard v0.0.0-20180326232728-33aaa0a0c8a5 h1:Uga1DHFN4GUxuDQr0F71tpi8I9HqPIlZodZAI1lR6VQ=
 github.com/ProtonMail/go-vcard v0.0.0-20180326232728-33aaa0a0c8a5/go.mod h1:oeP9CMN+ajWp5jKp1kue5daJNwMMxLF+ujPaUIoJWlA=
 github.com/ProtonMail/gopenpgp/v2 v2.0.1 h1:x0uvDhry5WzoHeJO4J3dgMLhG4Z9PeBJ2O+sDOY0LcU=
 github.com/ProtonMail/gopenpgp/v2 v2.0.1/go.mod h1:wQQCJo7DURO6S9VwH+kSDEYs/B63yZnAEfGlOg8YNBY=
-github.com/ProtonMail/mbox v0.0.0-20200918064939-909a18c9af45 h1:GDh55hDI2sNiirDqEWV8b6EB729u78Qxu3nKF970n6g=
-github.com/ProtonMail/mbox v0.0.0-20200918064939-909a18c9af45/go.mod h1:Yp9IVuuOYLEuMv4yjgDHvhb5mHOcYH6x92Oas3QqEZI=
 github.com/PuerkitoBio/goquery v1.5.1 h1:PSPBGne8NIUWw+/7vFBV+kG2J/5MOjbzc7154OaKCSE=
 github.com/PuerkitoBio/goquery v1.5.1/go.mod h1:GsLWisAFVj4WgDibEWF4pvYnkVQBpKBKeU+7zCJoLcc=
+github.com/Shopify/goreferrer v0.0.0-20181106222321-ec9c9a553398/go.mod h1:a1uqRtAwp2Xwc6WNPJEufxJ7fx3npB4UV/JOLmbu5I0=
 github.com/abiosoft/ishell v2.0.0+incompatible h1:zpwIuEHc37EzrsIYah3cpevrIc8Oma7oZPxr03tlmmw=
 github.com/abiosoft/ishell v2.0.0+incompatible/go.mod h1:HQR9AqF2R3P4XXpMpI0NAzgHf/aS6+zVXRj14cVk9qg=
 github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db h1:CjPUSXOiYptLbTdr1RceuZgSFDQ7U15ITERUGrUORx8=
 github.com/abiosoft/readline v0.0.0-20180607040430-155bce2042db/go.mod h1:rB3B4rKii8V21ydCbIzH5hZiCQE7f5E9SzUb/ZZx530=
+github.com/ajg/form v1.5.1/go.mod h1:uL1WgH+h2mgNtvBq0339dVnzXdBETtL2LeUXaIv25UY=
 github.com/allan-simon/go-singleinstance v0.0.0-20160830203053-79edcfdc2dfc h1:mZca0/HZ/XWXP9txkfdl2GH6mUzBqAlyJz3u5Lg8fuA=
 github.com/allan-simon/go-singleinstance v0.0.0-20160830203053-79edcfdc2dfc/go.mod h1:qqsTQiwdyqxU05iDCsi0oN3P4nrVxAmn8xCtODDSf/U=
 github.com/andybalholm/cascadia v1.1.0 h1:BuuO6sSfQNFRu1LppgbD25Hr2vLYW25JvxHs5zzsLTo=
 github.com/andybalholm/cascadia v1.1.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
-github.com/certifi/gocertifi v0.0.0-20200211180108-c7c1fbc02894 h1:JLaf/iINcLyjwbtTsCJjc6rtlASgHeIJPrB6QmwURnA=
-github.com/certifi/gocertifi v0.0.0-20200211180108-c7c1fbc02894/go.mod h1:sGbDF6GwGcLpkNXPUTkMRoywsNa/ol15pxFe6ERfguA=
+github.com/antlr/antlr4 v0.0.0-20201029161626-9a95f0cc3d7c h1:j/C2kxPfyE0d87/ggAjIsCV5Cdkqmjb+O0W8W+1J+IY=
+github.com/antlr/antlr4 v0.0.0-20201029161626-9a95f0cc3d7c/go.mod h1:T7PbCXFs94rrTttyxjbyT5+/1V8T2TYDejxUfHJjw1Y=
+github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
+github.com/aymerick/raymond v2.0.3-0.20180322193309-b565731e1464+incompatible/go.mod h1:osfaiScAUVup+UC9Nfq76eWqDhXlp+4UYaA8uhTBO6g=
 github.com/chzyer/logex v1.1.10 h1:Swpa1K6QvQznwJRcfTfQJmTE72DqScAa40E+fbHEXEE=
 github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
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 golang.org/x/sys v0.0.0-20190419153524-e8e3143a4f4a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190626221950-04f50cda93cb/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@ -199,6 +331,9 @@ golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3 h1:cokOdA+Jmi5PJGXLlLllQSgYigAEfHXJAERHVMaCc2k=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20181221001348-537d06c36207/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/tools v0.0.0-20190327201419-c70d86f8b7cf/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
+golang.org/x/tools v0.0.0-20190328211700-ab21143f2384/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190420181800-aa740d480789/go.mod h1:LCzVGOaR6xXOjkQ3onu1FJEFr0SW1gC7cKk1uF8kGRs=
 golang.org/x/tools v0.0.0-20190425150028-36563e24a262/go.mod h1:RgjU9mgBXZiqYHBnxXauZ1Gv1EHHAz9KjViQ78xBX0Q=
 golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
@ -208,9 +343,17 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
 gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
+gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
+gopkg.in/ini.v1 v1.51.1/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/mgo.v2 v2.0.0-20180705113604-9856a29383ce/go.mod h1:yeKp02qBN3iKW1OzL3MGk2IdtZzaj7SFntXj72NppTA=
 gopkg.in/stretchr/testify.v1 v1.2.2 h1:yhQC6Uy5CqibAIlk1wlusa/MJ3iAN49/BsR/dCCKz3M=
 gopkg.in/stretchr/testify.v1 v1.2.2/go.mod h1:QI5V/q6UbPmuhtm10CaFZxED9NreB8PnFYN9JcR6TxU=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.0-20191120175047-4206685974f2/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/internal/bridge/credits.go
+++ b/internal/bridge/credits.go
@ -15,8 +15,8 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.

-// Code generated by ./credits.sh at Tue Sep 29 14:56:25 CEST 2020. DO NOT EDIT.
+// Code generated by ./credits.sh at Tue Nov 24 08:56:01 AM CET 2020. DO NOT EDIT.

 package bridge

-const Credits = "github.com/0xAX/notificator;github.com/Masterminds/semver/v3;github.com/ProtonMail/bcrypt;github.com/ProtonMail/crypto;github.com/ProtonMail/docker-credential-helpers;github.com/ProtonMail/go-appdir;github.com/ProtonMail/go-apple-mobileconfig;github.com/ProtonMail/go-autostart;github.com/ProtonMail/go-imap;github.com/ProtonMail/go-imap-id;github.com/ProtonMail/go-smtp;github.com/ProtonMail/go-vcard;github.com/ProtonMail/gopenpgp/v2;github.com/ProtonMail/mbox;github.com/PuerkitoBio/goquery;github.com/abiosoft/ishell;github.com/abiosoft/readline;github.com/allan-simon/go-singleinstance;github.com/certifi/gocertifi;github.com/chzyer/logex;github.com/chzyer/test;github.com/cucumber/godog;github.com/docker/docker-credential-helpers;github.com/emersion/go-imap;github.com/emersion/go-imap-appendlimit;github.com/emersion/go-imap-idle;github.com/emersion/go-imap-move;github.com/emersion/go-imap-quota;github.com/emersion/go-imap-specialuse;github.com/emersion/go-imap-unselect;github.com/emersion/go-mbox;github.com/emersion/go-message;github.com/emersion/go-sasl;github.com/emersion/go-smtp;github.com/emersion/go-textwrapper;github.com/emersion/go-vcard;github.com/fatih/color;github.com/flynn-archive/go-shlex;github.com/getsentry/raven-go;github.com/go-resty/resty/v2;github.com/golang/mock;github.com/google/go-cmp;github.com/google/uuid;github.com/gopherjs/gopherjs;github.com/hashicorp/go-multierror;github.com/jameskeane/bcrypt;github.com/jaytaylor/html2text;github.com/kardianos/osext;github.com/keybase/go-keychain;github.com/logrusorgru/aurora;github.com/mattn/go-runewidth;github.com/miekg/dns;github.com/myesui/uuid;github.com/nsf/jsondiff;github.com/olekukonko/tablewriter;github.com/pkg/errors;github.com/sirupsen/logrus;github.com/skratchdot/open-golang;github.com/ssor/bom;github.com/stretchr/testify;github.com/therecipe/qt;github.com/twinj/uuid;github.com/urfave/cli;go.etcd.io/bbolt;golang.org/x/crypto;golang.org/x/net;golang.org/x/text;gopkg.in/stretchr/testify.v1;;Font Awesome 4.7.0;;Qt 5.13 by Qt group;"
+const Credits = "github.com/0xAX/notificator;github.com/abiosoft/ishell;github.com/abiosoft/readline;github.com/allan-simon/go-singleinstance;github.com/chzyer/logex;github.com/chzyer/test;github.com/cucumber/godog;github.com/docker/docker-credential-helpers;github.com/emersion/go-imap;github.com/emersion/go-imap-appendlimit;github.com/emersion/go-imap-idle;github.com/emersion/go-imap-move;github.com/emersion/go-imap-quota;github.com/emersion/go-imap-specialuse;github.com/emersion/go-imap-unselect;github.com/emersion/go-mbox;github.com/emersion/go-message;github.com/emersion/go-sasl;github.com/emersion/go-smtp;github.com/emersion/go-textwrapper;github.com/emersion/go-vcard;github.com/fatih/color;github.com/flynn-archive/go-shlex;github.com/getsentry/sentry-go;github.com/golang/mock;github.com/google/go-cmp;github.com/google/uuid;github.com/gopherjs/gopherjs;github.com/go-resty/resty/v2;github.com/hashicorp/go-multierror;github.com/jameskeane/bcrypt;github.com/jaytaylor/html2text;github.com/kardianos/osext;github.com/keybase/go-keychain;github.com/logrusorgru/aurora;github.com/Masterminds/semver/v3;github.com/mattn/go-runewidth;github.com/miekg/dns;github.com/myesui/uuid;github.com/nsf/jsondiff;github.com/olekukonko/tablewriter;github.com/pkg/errors;github.com/ProtonMail/bcrypt;github.com/ProtonMail/crypto;github.com/ProtonMail/docker-credential-helpers;github.com/ProtonMail/go-appdir;github.com/ProtonMail/go-apple-mobileconfig;github.com/ProtonMail/go-autostart;github.com/ProtonMail/go-imap;github.com/ProtonMail/go-imap-id;github.com/ProtonMail/gopenpgp/v2;github.com/ProtonMail/go-rfc5322;github.com/ProtonMail/go-smtp;github.com/ProtonMail/go-vcard;github.com/PuerkitoBio/goquery;github.com/sirupsen/logrus;github.com/skratchdot/open-golang;github.com/ssor/bom;github.com/stretchr/testify;github.com/therecipe/qt;github.com/twinj/uuid;github.com/urfave/cli;go.etcd.io/bbolt;golang.org/x/crypto;golang.org/x/net;golang.org/x/text;gopkg.in/stretchr/testify.v1;;Font Awesome 4.7.0;;Qt 5.13 by Qt group;"
--- a/internal/bridge/release_notes.go
+++ b/internal/bridge/release_notes.go
@ -15,21 +15,18 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.

-// Code generated by ./release-notes.sh at 'Mon Sep 21 01:29:10 PM CEST 2020'. DO NOT EDIT.
+// Code generated by ./release-notes.sh at 'Mon Nov 23 07:38:53 AM CET 2020'. DO NOT EDIT.

 package bridge

-const ReleaseNotes = `• Bulletproofing against any potential data loss and/or duplication
-• Performance improvements for handling attachments and non-standard formatting
-• Better stability of the message parser
-• Additional foreign encoding support for outgoing messages
-• Complete refactor of the way messages are parsed to simplify code maintenance
-• Improved User-Agent detection
-• Added MacOS Big Sur compatibility
-• Added persistent anonymous API cookies
+const ReleaseNotes = `• Improved package creation logic
+• Refactor of sending functions to simplify code maintenance
+• Added tests for package creation
+• For more detailed summary of the changes see https://github.com/ProtonMail/proton-bridge/blob/master/Changelog.md
 `

-const ReleaseFixedBugs = `• Fixed rare mail loss when moving from Spam folder
-• Limited log size
-• Fixed Linux font issues (mouse hover).
+const ReleaseFixedBugs = `• Bridge crashes related to labels handling
+• GUI popup related to TLS connection error
+• An issue where a random session key is included in the data payload
+• Error handling (including improved detection)
 `
--- a/internal/cmd/main.go
+++ b/internal/cmd/main.go
@ -22,7 +22,7 @@ import (
 	"runtime"

 	"github.com/ProtonMail/proton-bridge/pkg/constants"
-	"github.com/getsentry/raven-go"
+	"github.com/getsentry/sentry-go"
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 )
@ -51,10 +51,18 @@ var (

 // Main sets up Sentry, filters out unwanted args, creates app and runs it.
 func Main(appName, usage string, extraFlags []cli.Flag, run func(*cli.Context) error) {
-	if err := raven.SetDSN(constants.DSNSentry); err != nil {
+	err := sentry.Init(sentry.ClientOptions{
+		Dsn:     constants.DSNSentry,
+		Release: constants.Revision,
+	})
+
+	sentry.ConfigureScope(func(scope *sentry.Scope) {
+		scope.SetFingerprint([]string{"{{ default }}"})
+	})
+
+	if err != nil {
 		log.WithError(err).Errorln("Can not setup sentry DSN")
 	}
-	raven.SetRelease(constants.Revision)

 	filterProcessSerialNumberFromArgs()
 	filterRestartNumberFromArgs()
--- a/internal/events/events.go
+++ b/internal/events/events.go
@ -40,7 +40,6 @@ const (
 	NoActiveKeyForRecipientEvent = "noActiveKeyForRecipient"
 	UpgradeApplicationEvent      = "upgradeApplication"
 	TLSCertIssue                 = "tlsCertPinningIssue"
-	IMAPTLSBadCert               = "imapTLSBadCert"

 	// LogoutEventTimeout is the minimum time to permit between logout events being sent.
 	LogoutEventTimeout = 3 * time.Minute
--- a/internal/frontend/cli-ie/importexport.go
+++ b/internal/frontend/cli-ie/importexport.go
@ -184,9 +184,17 @@ func (f *frontendCLI) setTransferRules(t *transfer.Transfer) bool {
 }

 func (f *frontendCLI) printTransferProgress(progress *transfer.Progress) {
-	failed, imported, exported, added, total := progress.GetCounts()
-	if total != 0 {
-		f.Println(fmt.Sprintf("Progress update: %d (%d / %d) / %d, failed: %d", imported, exported, added, total, failed))
+	counts := progress.GetCounts()
+	if counts.Total != 0 {
+		f.Println(fmt.Sprintf(
+			"Progress update: %d (%d / %d) / %d, skipped: %d, failed: %d",
+			counts.Imported,
+			counts.Exported,
+			counts.Added,
+			counts.Total,
+			counts.Skipped,
+			counts.Failed,
+		))
 	}

 	if progress.IsPaused() {
--- a/internal/frontend/qml/Gui.qml
+++ b/internal/frontend/qml/Gui.qml
@ -237,13 +237,6 @@ Item {
            winMain.tlsBarState="notOK"
        }

-        onShowIMAPCertTroubleshoot : {
-            go.notifyBubble(1, qsTr(
-                "Bridge was unable to establish a connection with your Email client. <br> <a href=\"https://protonmail.com/support/knowledge-base/bridge-ssl-connection-issue\">Learn more</a> <br>",
-                "notification message"
-            ))
-        }
-

    }

--- a/internal/frontend/qml/ImportExportUI/DialogImport.qml
+++ b/internal/frontend/qml/ImportExportUI/DialogImport.qml
@ -599,7 +599,7 @@ Dialog {
            }

            Text {
-                text: qsTr("<b>Import summary:</b><br>Total number of emails: %1<br>Imported emails: %2<br>Errors: %3").arg(go.total).arg(finalReport.imported).arg(go.progressFails)
+                text: qsTr("<b>Import summary:</b><br>Total number of emails: %1<br>Imported emails: %2<br>Filtered out emails: %3<br>Errors: %4").arg(go.total).arg(go.progressImported).arg(go.progressSkipped).arg(go.progressFails)
                anchors.horizontalCenter: parent.horizontalCenter
                textFormat: Text.RichText
                horizontalAlignment: Text.AlignHCenter
--- a/internal/frontend/qml/ImportExportUI/InlineLabelSelect.qml
+++ b/internal/frontend/qml/ImportExportUI/InlineLabelSelect.qml
@ -45,7 +45,7 @@ Row {
    }

    InfoToolTip {
-        info: qsTr( "When master import lablel is selected then all imported email will have this label.", "Tooltip text for master import label")
+        info: qsTr( "When master import label is selected then all imported emails will have this label.", "Tooltip text for master import label")
        anchors.verticalCenter: parent.verticalCenter
    }

--- a/internal/frontend/qml/tst_Gui.qml
+++ b/internal/frontend/qml/tst_Gui.qml
@ -122,7 +122,6 @@ Window {
        ListElement { title: "Minimize this"  }
        ListElement { title: "SendAlertPopup" }
        ListElement { title: "TLSCertError"   }
-        ListElement { title: "IMAPCertError"  }
    }

    ListView {
@ -209,9 +208,6 @@ Window {
                    case "TLSCertError" :
                    go.showCertIssue()
                    break;
-                    case "IMAPCertError" :
-                    go.showIMAPCertTroubleshoot()
-                    break;
                    default :
                    console.log("Not implemented " + data)
                }
@ -314,7 +310,6 @@ Window {
        signal failedAutostartCode(string code)

        signal showCertIssue()
-        signal showIMAPCertTroubleshoot()

        signal updateFinished(bool hasError)

--- a/internal/frontend/qml/tst_GuiIE.qml
+++ b/internal/frontend/qml/tst_GuiIE.qml
@ -840,6 +840,8 @@ Window {

        property real progress: 0.0
        property int progressFails: 0
+        property int progressImported: 0
+        property int progressSkipped: 0
        property string progressDescription: "nothing"
        property string progressInit: "init"
        property int total: 42
@ -1011,6 +1013,8 @@ Window {
        property SequentialAnimation animateProgressBar : SequentialAnimation {
            id: apb
            property real speedup : 1.0;
+            PropertyAnimation{ target: go; properties: "progressSkipped"; to: 0; duration: 1; }
+            PropertyAnimation{ target: go; properties: "progressImported"; to: 0; duration: 1; }
            PropertyAnimation{ target: go; properties: "importLogFileName"; to: ""; duration: 1; }
            PropertyAnimation{ target: go; properties: "progressDescription"; to: go.progressInit; duration: 1; }
            PropertyAnimation{ duration: 2000/apb.speedup; }
@ -1024,6 +1028,8 @@ Window {
            PropertyAnimation{ target: go; properties: "progress"; to: 0.01; duration: 1; }
            PropertyAnimation{ duration: 1000/apb.speedup; }
            PropertyAnimation{ target: go; properties: "progress"; to: 0.1; duration: 1; }
+            PropertyAnimation{ target: go; properties: "progressSkipped"; to: 12; duration: 1; }
+            PropertyAnimation{ target: go; properties: "progressImported"; to: 13.1; duration: 1; }
            PropertyAnimation{ duration: 1000/apb.speedup; }
            PropertyAnimation{ target: go; properties: "progress"; to: 0.3; duration: 1; }
            PropertyAnimation{ target: go; properties: "progressFails"; to: 1; duration: 1; }
--- a/internal/frontend/qt-common/account_model.go
+++ b/internal/frontend/qt-common/account_model.go
@ -21,6 +21,7 @@ package qtcommon

 import (
 	"fmt"
+
 	"github.com/therecipe/qt/core"
 )

--- a/internal/frontend/qt-ie/frontend.go
+++ b/internal/frontend/qt-ie/frontend.go
@ -337,18 +337,25 @@ func (f *FrontendQt) setProgressManager(progress *transfer.Progress) {
 			if progress.IsStopped() {
 				break
 			}
-			failed, imported, _, _, total := progress.GetCounts()
-			f.Qml.SetTotal(int(total))
-			f.Qml.SetProgressFails(int(failed))
+			counts := progress.GetCounts()
+			f.Qml.SetTotal(int(counts.Total))
+			f.Qml.SetProgressImported(int(counts.Imported))
+			f.Qml.SetProgressSkipped(int(counts.Skipped))
+			f.Qml.SetProgressFails(int(counts.Failed))
 			f.Qml.SetProgressDescription(progress.PauseReason())
-			if total > 0 {
-				newProgress := float32(imported+failed) / float32(total)
+			if counts.Total > 0 {
+				newProgress := counts.Progress()
 				if newProgress >= 0 && newProgress != f.Qml.Progress() {
 					f.Qml.SetProgress(newProgress)
 					f.Qml.ProgressChanged(newProgress)
 				}
 			}
 		}
+		// Counts will add lost messages only once the progress is completeled.
+		counts := progress.GetCounts()
+		f.Qml.SetProgressImported(int(counts.Imported))
+		f.Qml.SetProgressSkipped(int(counts.Skipped))
+		f.Qml.SetProgressFails(int(counts.Failed))

 		if err := progress.GetFatalError(); err != nil {
 			f.Qml.SetProgressDescription(err.Error())
--- a/internal/frontend/qt-ie/import.go
+++ b/internal/frontend/qt-ie/import.go
@ -77,6 +77,8 @@ func (f *FrontendQt) StartImport(email string) { // TODO email not needed
 	log.Trace("Starting import")

 	f.Qml.SetProgressDescription("init") // TODO use const
+	f.Qml.SetProgressImported(0)
+	f.Qml.SetProgressSkipped(0)
 	f.Qml.SetProgressFails(0)
 	f.Qml.SetProgress(0.0)
 	f.Qml.SetTotal(1)
--- a/internal/frontend/qt-ie/ui.go
+++ b/internal/frontend/qt-ie/ui.go
@ -43,6 +43,8 @@ type GoQMLInterface struct {
 	_ string  `property:lastError`
 	_ float32 `property:progress`
 	_ string  `property:progressDescription`
+	_ int     `property:progressImported`
+	_ int     `property:progressSkipped`
 	_ int     `property:progressFails`
 	_ int     `property:total`
 	_ string  `property:importLogFileName`
--- a/internal/frontend/qt/frontend.go
+++ b/internal/frontend/qt/frontend.go
@ -40,17 +40,17 @@ import (
 	"github.com/ProtonMail/proton-bridge/internal/bridge"
 	"github.com/ProtonMail/proton-bridge/internal/events"
 	"github.com/ProtonMail/proton-bridge/internal/frontend/autoconfig"
-	"github.com/ProtonMail/proton-bridge/internal/frontend/qt-common"
+	qtcommon "github.com/ProtonMail/proton-bridge/internal/frontend/qt-common"
 	"github.com/ProtonMail/proton-bridge/internal/frontend/types"
 	"github.com/ProtonMail/proton-bridge/internal/preferences"
 	"github.com/ProtonMail/proton-bridge/internal/updates"
 	"github.com/ProtonMail/proton-bridge/pkg/config"
-	"github.com/ProtonMail/proton-bridge/pkg/ports"
-	"github.com/ProtonMail/proton-bridge/pkg/useragent"
 	"github.com/ProtonMail/proton-bridge/pkg/listener"
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
-	"github.com/sirupsen/logrus"
+	"github.com/ProtonMail/proton-bridge/pkg/ports"
+	"github.com/ProtonMail/proton-bridge/pkg/useragent"
 	"github.com/kardianos/osext"
+	"github.com/sirupsen/logrus"
 	"github.com/skratchdot/open-golang/open"
 	"github.com/therecipe/qt/core"
 	"github.com/therecipe/qt/gui"
@ -187,7 +187,6 @@ func (s *FrontendQt) watchEvents() {
 	updateApplicationCh := s.getEventChannel(events.UpgradeApplicationEvent)
 	newUserCh := s.getEventChannel(events.UserRefreshEvent)
 	certIssue := s.getEventChannel(events.TLSCertIssue)
-	imapCertIssue := s.getEventChannel(events.IMAPTLSBadCert)
 	for {
 		select {
 		case errorDetails := <-errorCh:
@ -227,8 +226,6 @@ func (s *FrontendQt) watchEvents() {
 			s.Qml.LoadAccounts()
 		case <-certIssue:
 			s.Qml.ShowCertIssue()
-		case <-imapCertIssue:
-			s.Qml.ShowIMAPCertTroubleshoot()
 		}
 	}
 }
--- a/internal/frontend/qt/ui.go
+++ b/internal/frontend/qt/ui.go
@ -135,7 +135,6 @@ type GoQMLInterface struct {
 	_ func(x, y float32)                      `slot:"saveOutgoingNoEncPopupCoord"`
 	_ func(recipient string)                  `signal:"showNoActiveKeyForRecipient"`
 	_ func()                                  `signal:"showCertIssue"`
-	_ func()                                  `signal:"ShowIMAPCertTroubleshoot"`

 	_ func()              `slot:"startUpdate"`
 	_ func(hasError bool) `signal:"updateFinished"`
--- a/internal/imap/backend.go
+++ b/internal/imap/backend.go
@ -28,7 +28,6 @@ import (
 	"github.com/ProtonMail/proton-bridge/pkg/listener"
 	"github.com/emersion/go-imap"
 	goIMAPBackend "github.com/emersion/go-imap/backend"
-	"github.com/sirupsen/logrus"
 )

 type panicHandler interface {
@ -198,11 +197,3 @@ func (ib *imapBackend) monitorDisconnectedUsers() {
 		ib.deleteUser(address)
 	}
 }
-
-func (ib *imapBackend) upgradeError(err error) {
-	logrus.WithError(err).Error("IMAP connection couldn't be upgraded to TLS during STARTTLS")
-
-	if strings.Contains(err.Error(), "remote error: tls: bad certificate") {
-		ib.eventListener.Emit(events.IMAPTLSBadCert, err.Error())
-	}
-}
--- a/internal/imap/server.go
+++ b/internal/imap/server.go
@ -58,7 +58,6 @@ func NewIMAPServer(debugClient, debugServer bool, port int, tls *tls.Config, ima
 	s.AllowInsecureAuth = true
 	s.ErrorLog = newServerErrorLogger("server-imap")
 	s.AutoLogout = 30 * time.Minute
-	s.UpgradeError = imapBackend.upgradeError

 	serverID := imapid.ID{
 		imapid.FieldName:       "ProtonMail Bridge",
--- a/internal/importexport/credits.go
+++ b/internal/importexport/credits.go
@ -15,8 +15,8 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.

-// Code generated by ./credits.sh at Tue Sep 29 14:56:25 CEST 2020. DO NOT EDIT.
+// Code generated by ./credits.sh at Tue Nov 24 08:56:01 AM CET 2020. DO NOT EDIT.

 package importexport

-const Credits = "github.com/0xAX/notificator;github.com/Masterminds/semver/v3;github.com/ProtonMail/bcrypt;github.com/ProtonMail/crypto;github.com/ProtonMail/docker-credential-helpers;github.com/ProtonMail/go-appdir;github.com/ProtonMail/go-apple-mobileconfig;github.com/ProtonMail/go-autostart;github.com/ProtonMail/go-imap;github.com/ProtonMail/go-imap-id;github.com/ProtonMail/go-smtp;github.com/ProtonMail/go-vcard;github.com/ProtonMail/gopenpgp/v2;github.com/ProtonMail/mbox;github.com/PuerkitoBio/goquery;github.com/abiosoft/ishell;github.com/abiosoft/readline;github.com/allan-simon/go-singleinstance;github.com/certifi/gocertifi;github.com/chzyer/logex;github.com/chzyer/test;github.com/cucumber/godog;github.com/docker/docker-credential-helpers;github.com/emersion/go-imap;github.com/emersion/go-imap-appendlimit;github.com/emersion/go-imap-idle;github.com/emersion/go-imap-move;github.com/emersion/go-imap-quota;github.com/emersion/go-imap-specialuse;github.com/emersion/go-imap-unselect;github.com/emersion/go-mbox;github.com/emersion/go-message;github.com/emersion/go-sasl;github.com/emersion/go-smtp;github.com/emersion/go-textwrapper;github.com/emersion/go-vcard;github.com/fatih/color;github.com/flynn-archive/go-shlex;github.com/getsentry/raven-go;github.com/go-resty/resty/v2;github.com/golang/mock;github.com/google/go-cmp;github.com/google/uuid;github.com/gopherjs/gopherjs;github.com/hashicorp/go-multierror;github.com/jameskeane/bcrypt;github.com/jaytaylor/html2text;github.com/kardianos/osext;github.com/keybase/go-keychain;github.com/logrusorgru/aurora;github.com/mattn/go-runewidth;github.com/miekg/dns;github.com/myesui/uuid;github.com/nsf/jsondiff;github.com/olekukonko/tablewriter;github.com/pkg/errors;github.com/sirupsen/logrus;github.com/skratchdot/open-golang;github.com/ssor/bom;github.com/stretchr/testify;github.com/therecipe/qt;github.com/twinj/uuid;github.com/urfave/cli;go.etcd.io/bbolt;golang.org/x/crypto;golang.org/x/net;golang.org/x/text;gopkg.in/stretchr/testify.v1;;Font Awesome 4.7.0;;Qt 5.13 by Qt group;"
+const Credits = "github.com/0xAX/notificator;github.com/abiosoft/ishell;github.com/abiosoft/readline;github.com/allan-simon/go-singleinstance;github.com/chzyer/logex;github.com/chzyer/test;github.com/cucumber/godog;github.com/docker/docker-credential-helpers;github.com/emersion/go-imap;github.com/emersion/go-imap-appendlimit;github.com/emersion/go-imap-idle;github.com/emersion/go-imap-move;github.com/emersion/go-imap-quota;github.com/emersion/go-imap-specialuse;github.com/emersion/go-imap-unselect;github.com/emersion/go-mbox;github.com/emersion/go-message;github.com/emersion/go-sasl;github.com/emersion/go-smtp;github.com/emersion/go-textwrapper;github.com/emersion/go-vcard;github.com/fatih/color;github.com/flynn-archive/go-shlex;github.com/getsentry/sentry-go;github.com/golang/mock;github.com/google/go-cmp;github.com/google/uuid;github.com/gopherjs/gopherjs;github.com/go-resty/resty/v2;github.com/hashicorp/go-multierror;github.com/jameskeane/bcrypt;github.com/jaytaylor/html2text;github.com/kardianos/osext;github.com/keybase/go-keychain;github.com/logrusorgru/aurora;github.com/Masterminds/semver/v3;github.com/mattn/go-runewidth;github.com/miekg/dns;github.com/myesui/uuid;github.com/nsf/jsondiff;github.com/olekukonko/tablewriter;github.com/pkg/errors;github.com/ProtonMail/bcrypt;github.com/ProtonMail/crypto;github.com/ProtonMail/docker-credential-helpers;github.com/ProtonMail/go-appdir;github.com/ProtonMail/go-apple-mobileconfig;github.com/ProtonMail/go-autostart;github.com/ProtonMail/go-imap;github.com/ProtonMail/go-imap-id;github.com/ProtonMail/gopenpgp/v2;github.com/ProtonMail/go-rfc5322;github.com/ProtonMail/go-smtp;github.com/ProtonMail/go-vcard;github.com/PuerkitoBio/goquery;github.com/sirupsen/logrus;github.com/skratchdot/open-golang;github.com/ssor/bom;github.com/stretchr/testify;github.com/therecipe/qt;github.com/twinj/uuid;github.com/urfave/cli;go.etcd.io/bbolt;golang.org/x/crypto;golang.org/x/net;golang.org/x/text;gopkg.in/stretchr/testify.v1;;Font Awesome 4.7.0;;Qt 5.13 by Qt group;"
--- a/internal/importexport/release_notes.go
+++ b/internal/importexport/release_notes.go
@ -15,18 +15,14 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.

-// Code generated by ./release-notes.sh at 'Thu Oct 29 12:57:32 PM CET 2020'. DO NOT EDIT.
+// Code generated by ./release-notes.sh at 'Wed Nov 11 01:57:14 PM CET 2020'. DO NOT EDIT.

 package importexport

-const ReleaseNotes = `• Improvements to the import from large mbox files with multiple labels
-• Not allow to run multiple instances of the app or transfers at the same time
-• Various enhancements of the import process related to parsing
-• Cosmetic GUI changes
-• Better error handling
+const ReleaseNotes = `• Further improvements to address and date parsing
+• Better handling and displaying of skipped messages
+• Improved error reporting
 `

-const ReleaseFixedBugs = `• Linux font issues - Fedora specific
-• App response to the user pausing and canceling import or export
-• Handling errors during update
+const ReleaseFixedBugs = `
 `
--- a/internal/smtp/preferences.go
+++ b/internal/smtp/preferences.go
@ -45,7 +45,7 @@ type SendPreferences struct {
 	// internal emails (including the so-called encrypted-to-outside emails,
 	// which even though meant for external users, they don't really get out of
 	// our platform). If the email is sent unencrypted, no PGP scheme is needed.
-	Scheme int
+	Scheme pmapi.PackageFlag

 	// MIMEType is the MIME type to use for formatting the body of the email
 	// (before encryption/after decryption). The standard possibilities are the
@ -191,8 +191,12 @@ func (b *sendPreferencesBuilder) build() (p SendPreferences) {
 			p.Scheme = pmapi.PGPMIMEPackage
 		}

-	case b.shouldSign() && !b.shouldEncrypt() && b.getScheme() == pgpMIME:
+	case b.shouldSign() && !b.shouldEncrypt():
+		if b.getScheme() == pgpInline {
+			p.Scheme = pmapi.ClearPackage
+		} else {
 			p.Scheme = pmapi.ClearMIMEPackage
+		}

 	default:
 		p.Scheme = pmapi.ClearPackage
--- a/internal/smtp/preferences_test.go
+++ b/internal/smtp/preferences_test.go
@ -41,7 +41,7 @@ func TestPreferencesBuilder(t *testing.T) {

 		wantEncrypt   bool
 		wantSign      bool
-		wantScheme    int
+		wantScheme    pmapi.PackageFlag
 		wantMIMEType  string
 		wantPublicKey string
 	}{
@ -254,6 +254,20 @@ func TestPreferencesBuilder(t *testing.T) {
 			wantMIMEType: "multipart/mixed",
 		},

+		{
+			name: "external with contact sign enabled and plain text",
+
+			contactMeta:  &ContactMetadata{MIMEType: "text/plain", Scheme: pgpInline, Sign: true, SignIsSet: true},
+			receivedKeys: []pmapi.PublicKey{},
+			isInternal:   false,
+			mailSettings: pmapi.MailSettings{PGPScheme: pmapi.PGPMIMEPackage, DraftMIMEType: "text/html"},
+
+			wantEncrypt:  false,
+			wantSign:     true,
+			wantScheme:   pmapi.ClearPackage,
+			wantMIMEType: "text/plain",
+		},
+
 		{
 			name: "external with sign enabled, sending plaintext, should still send as ClearMIME",

--- a/internal/smtp/user.go
+++ b/internal/smtp/user.go
@ -187,7 +187,7 @@ func (su *smtpUser) Send(from string, to []string, messageReader io.Reader) (err
 		log.WithError(err).Error("Failed to parse message")
 		return
 	}
-	clearBody := message.Body
+	richBody := message.Body

 	externalID := message.Header.Get("Message-Id")
 	externalID = strings.Trim(externalID, "<>")
@ -256,7 +256,6 @@ func (su *smtpUser) Send(from string, to []string, messageReader io.Reader) (err
 	atts = append(atts, message.Attachments...)
 	// Decrypt attachment keys, because we will need to re-encrypt them with the recipients' public keys.
 	attkeys := make(map[string]*crypto.SessionKey)
-	attkeysEncoded := make(map[string]pmapi.AlgoKey)

 	for _, att := range atts {
 		var keyPackets []byte
@ -266,23 +265,9 @@ func (su *smtpUser) Send(from string, to []string, messageReader io.Reader) (err
 		if attkeys[att.ID], err = kr.DecryptSessionKey(keyPackets); err != nil {
 			return errors.Wrap(err, "decrypting attachment session key")
 		}
-		attkeysEncoded[att.ID] = pmapi.AlgoKey{
-			Key:       attkeys[att.ID].GetBase64Key(),
-			Algorithm: attkeys[att.ID].Algo,
-		}
 	}

-	plainSharedScheme := 0
-	htmlSharedScheme := 0
-	mimeSharedType := 0
-
-	plainAddressMap := make(map[string]*pmapi.MessageAddress)
-	htmlAddressMap := make(map[string]*pmapi.MessageAddress)
-	mimeAddressMap := make(map[string]*pmapi.MessageAddress)
-
-	var plainKey, htmlKey, mimeKey *crypto.SessionKey
-	var plainData, htmlData, mimeData []byte
-
+	req := pmapi.NewSendMessageReq(kr, mimeBody, plainBody, richBody, attkeys)
 	containsUnencryptedRecipients := false

 	for _, email := range to {
@ -298,61 +283,15 @@ func (su *smtpUser) Send(from string, to []string, messageReader io.Reader) (err
 			return err
 		}

-		var signature int
+		var signature pmapi.SignatureFlag
 		if sendPreferences.Sign {
-			signature = pmapi.YesSignature
+			signature = pmapi.SignatureDetached
 		} else {
-			signature = pmapi.NoSignature
-		}
-		if sendPreferences.Scheme == pmapi.PGPMIMEPackage || sendPreferences.Scheme == pmapi.ClearMIMEPackage {
-			if mimeKey == nil {
-				if mimeKey, mimeData, err = encryptSymmetric(kr, mimeBody, true); err != nil {
-					return err
-				}
-			}
-			if sendPreferences.Scheme == pmapi.PGPMIMEPackage {
-				mimeBodyPacket, _, err := createPackets(sendPreferences.PublicKey, mimeKey, map[string]*crypto.SessionKey{})
-				if err != nil {
-					return err
-				}
-				mimeAddressMap[email] = &pmapi.MessageAddress{Type: sendPreferences.Scheme, BodyKeyPacket: mimeBodyPacket, Signature: signature}
-			} else {
-				mimeAddressMap[email] = &pmapi.MessageAddress{Type: sendPreferences.Scheme, Signature: signature}
-			}
-			mimeSharedType |= sendPreferences.Scheme
-		} else {
-			switch sendPreferences.MIMEType {
-			case pmapi.ContentTypePlainText:
-				if plainKey == nil {
-					if plainKey, plainData, err = encryptSymmetric(kr, plainBody, true); err != nil {
-						return err
-					}
-				}
-				newAddress := &pmapi.MessageAddress{Type: sendPreferences.Scheme, Signature: signature}
-				if sendPreferences.Encrypt && sendPreferences.PublicKey != nil {
-					newAddress.BodyKeyPacket, newAddress.AttachmentKeyPackets, err = createPackets(sendPreferences.PublicKey, plainKey, attkeys)
-					if err != nil {
-						return err
-					}
-				}
-				plainAddressMap[email] = newAddress
-				plainSharedScheme |= sendPreferences.Scheme
-			case pmapi.ContentTypeHTML:
-				if htmlKey == nil {
-					if htmlKey, htmlData, err = encryptSymmetric(kr, clearBody, true); err != nil {
-						return err
-					}
-				}
-				newAddress := &pmapi.MessageAddress{Type: sendPreferences.Scheme, Signature: signature}
-				if sendPreferences.Encrypt && sendPreferences.PublicKey != nil {
-					newAddress.BodyKeyPacket, newAddress.AttachmentKeyPackets, err = createPackets(sendPreferences.PublicKey, htmlKey, attkeys)
-					if err != nil {
-						return err
-					}
-				}
-				htmlAddressMap[email] = newAddress
-				htmlSharedScheme |= sendPreferences.Scheme
+			signature = pmapi.SignatureNone
 		}
+
+		if err := req.AddRecipient(email, sendPreferences.Scheme, sendPreferences.PublicKey, signature, sendPreferences.MIMEType, sendPreferences.Encrypt); err != nil {
+			return errors.Wrap(err, "failed to add recipient")
 		}
 	}

@ -370,31 +309,7 @@ func (su *smtpUser) Send(from string, to []string, messageReader io.Reader) (err
 		}
 	}

-	req := &pmapi.SendMessageReq{}
-
-	plainPkg := buildPackage(plainAddressMap, plainSharedScheme, pmapi.ContentTypePlainText, plainData, plainKey, attkeysEncoded)
-	if plainPkg != nil {
-		req.Packages = append(req.Packages, plainPkg)
-	}
-
-	htmlPkg := buildPackage(htmlAddressMap, htmlSharedScheme, pmapi.ContentTypeHTML, htmlData, htmlKey, attkeysEncoded)
-	if htmlPkg != nil {
-		req.Packages = append(req.Packages, htmlPkg)
-	}
-
-	if len(mimeAddressMap) > 0 {
-		pkg := &pmapi.MessagePackage{
-			Body:      base64.StdEncoding.EncodeToString(mimeData),
-			Addresses: mimeAddressMap,
-			MIMEType:  pmapi.ContentTypeMultipartMixed,
-			Type:      mimeSharedType,
-			BodyKey: pmapi.AlgoKey{
-				Key:       mimeKey.GetBase64Key(),
-				Algorithm: mimeKey.Algo,
-			},
-		}
-		req.Packages = append(req.Packages, pkg)
-	}
+	req.PreparePackages()

 	return su.storeUser.SendMessage(message.ID, req)
 }
--- a/internal/smtp/utils.go
+++ b/internal/smtp/utils.go
@ -18,11 +18,7 @@
 package smtp

 import (
-	"encoding/base64"
 	"regexp"
-
-	"github.com/ProtonMail/gopenpgp/v2/crypto"
-	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
 )

 //nolint:gochecknoglobals // Used like a constant
@ -35,85 +31,3 @@ var mailFormat = regexp.MustCompile(`.+@.+\..+`)
 func looksLikeEmail(e string) bool {
 	return mailFormat.MatchString(e)
 }
-
-func createPackets(
-	pubkey *crypto.KeyRing,
-	bodyKey *crypto.SessionKey,
-	attkeys map[string]*crypto.SessionKey,
-) (bodyPacket string, attachmentPackets map[string]string, err error) {
-	// Encrypt message body keys.
-	packetBytes, err := pubkey.EncryptSessionKey(bodyKey)
-	if err != nil {
-		return
-	}
-	bodyPacket = base64.StdEncoding.EncodeToString(packetBytes)
-
-	// Encrypt attachment keys.
-	attachmentPackets = make(map[string]string)
-	for id, attkey := range attkeys {
-		var packets []byte
-		if packets, err = pubkey.EncryptSessionKey(attkey); err != nil {
-			return
-		}
-		attachmentPackets[id] = base64.StdEncoding.EncodeToString(packets)
-	}
-	return
-}
-
-func encryptSymmetric(
-	kr *crypto.KeyRing,
-	textToEncrypt string,
-	canonicalizeText bool, // nolint[unparam]
-) (key *crypto.SessionKey, symEncryptedData []byte, err error) {
-	// We use only primary key to encrypt the message. Our keyring contains all keys (primary, old and deacivated ones).
-	firstKey, err := kr.FirstKey()
-	if err != nil {
-		return
-	}
-
-	pgpMessage, err := firstKey.Encrypt(crypto.NewPlainMessageFromString(textToEncrypt), kr)
-	if err != nil {
-		return
-	}
-
-	pgpSplitMessage, err := pgpMessage.SeparateKeyAndData(len(textToEncrypt), 0)
-	if err != nil {
-		return
-	}
-
-	key, err = kr.DecryptSessionKey(pgpSplitMessage.GetBinaryKeyPacket())
-	if err != nil {
-		return
-	}
-
-	symEncryptedData = pgpSplitMessage.GetBinaryDataPacket()
-
-	return
-}
-
-func buildPackage(
-	addressMap map[string]*pmapi.MessageAddress,
-	sharedScheme int,
-	mimeType string,
-	bodyData []byte,
-	bodyKey *crypto.SessionKey,
-	attKeys map[string]pmapi.AlgoKey,
-) (pkg *pmapi.MessagePackage) {
-	if len(addressMap) == 0 {
-		return nil
-	}
-
-	pkg = &pmapi.MessagePackage{
-		Body:      base64.StdEncoding.EncodeToString(bodyData),
-		Addresses: addressMap,
-		MIMEType:  mimeType,
-		Type:      sharedScheme,
-	}
-
-	if sharedScheme|pmapi.ClearPackage > 0 {
-		pkg.BodyKey.Key = bodyKey.GetBase64Key()
-		pkg.BodyKey.Algorithm = bodyKey.Algo
-		pkg.AttachmentKeys = attKeys
-	}
-	return pkg
-}
--- a/internal/store/change.go
+++ b/internal/store/change.go
@ -37,7 +37,7 @@ func (store *Store) SetIMAPUpdateChannel(updates chan imapBackend.Update) {
 	}
 }

-func (store *Store) imapNotice(address, notice string) {
+func (store *Store) imapNotice(address, notice string) *imapBackend.StatusUpdate {
 	update := new(imapBackend.StatusUpdate)
 	update.Update = imapBackend.NewUpdate(address, "")
 	update.StatusResp = &imap.StatusResp{
@ -46,13 +46,14 @@ func (store *Store) imapNotice(address, notice string) {
 		Info: notice,
 	}
 	store.imapSendUpdate(update)
+	return update
 }

 func (store *Store) imapUpdateMessage(
 	address, mailboxName string,
 	uid, sequenceNumber uint32,
 	msg *pmapi.Message, hasDeletedFlag bool,
-) {
+) *imapBackend.MessageUpdate {
 	store.log.WithFields(logrus.Fields{
 		"address": address,
 		"mailbox": mailboxName,
@ -70,9 +71,10 @@ func (store *Store) imapUpdateMessage(
 	}
 	update.Message.Uid = uid
 	store.imapSendUpdate(update)
+	return update
 }

-func (store *Store) imapDeleteMessage(address, mailboxName string, sequenceNumber uint32) {
+func (store *Store) imapDeleteMessage(address, mailboxName string, sequenceNumber uint32) *imapBackend.ExpungeUpdate {
 	store.log.WithFields(logrus.Fields{
 		"address": address,
 		"mailbox": mailboxName,
@ -82,9 +84,10 @@ func (store *Store) imapDeleteMessage(address, mailboxName string, sequenceNumbe
 	update.Update = imapBackend.NewUpdate(address, mailboxName)
 	update.SeqNum = sequenceNumber
 	store.imapSendUpdate(update)
+	return update
 }

-func (store *Store) imapMailboxCreated(address, mailboxName string) {
+func (store *Store) imapMailboxCreated(address, mailboxName string) *imapBackend.MailboxInfoUpdate {
 	store.log.WithFields(logrus.Fields{
 		"address": address,
 		"mailbox": mailboxName,
@ -97,9 +100,10 @@ func (store *Store) imapMailboxCreated(address, mailboxName string) {
 		Name:       mailboxName,
 	}
 	store.imapSendUpdate(update)
+	return update
 }

-func (store *Store) imapMailboxStatus(address, mailboxName string, total, unread, unreadSeqNum uint) {
+func (store *Store) imapMailboxStatus(address, mailboxName string, total, unread, unreadSeqNum uint) *imapBackend.MailboxUpdate {
 	store.log.WithFields(logrus.Fields{
 		"address":      address,
 		"mailbox":      mailboxName,
@ -114,6 +118,7 @@ func (store *Store) imapMailboxStatus(address, mailboxName string, total, unread
 	update.MailboxStatus.Unseen = uint32(unread)
 	update.MailboxStatus.UnseenSeqNum = uint32(unreadSeqNum)
 	store.imapSendUpdate(update)
+	return update
 }

 func (store *Store) imapSendUpdate(update imapBackend.Update) {
--- a/internal/store/mailbox.go
+++ b/internal/store/mailbox.go
@ -21,6 +21,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
+	"sync/atomic"

 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	"github.com/sirupsen/logrus"
@ -38,6 +39,8 @@ type Mailbox struct {
 	color       string

 	log *logrus.Entry
+
+	isDeleting atomic.Value
 }

 func newMailbox(storeAddress *Address, labelID, labelPrefix, labelName, color string) (mb *Mailbox, err error) {
@ -59,6 +62,7 @@ func txNewMailbox(tx *bolt.Tx, storeAddress *Address, labelID, labelPrefix, labe
 		color:        color,
 		log:          l,
 	}
+	mb.isDeleting.Store(false)

 	err := initMailboxBucket(tx, mb.getBucketName())
 	if err != nil {
@ -215,6 +219,7 @@ func (storeMailbox *Mailbox) Rename(newName string) error {
 // Deletion has to be propagated to all the same mailboxes in all addresses.
 // The propagation is processed by the event loop.
 func (storeMailbox *Mailbox) Delete() error {
+	storeMailbox.isDeleting.Store(true)
 	return storeMailbox.storeAddress.deleteMailbox(storeMailbox.labelID)
 }

@ -226,6 +231,14 @@ func (storeMailbox *Mailbox) GetDelimiter() string {
 // deleteMailboxEvent deletes the mailbox bucket.
 // This is called from the event loop.
 func (storeMailbox *Mailbox) deleteMailboxEvent() error {
+	if !storeMailbox.isDeleting.Load().(bool) {
+		// Deleting label removes bucket. Any ongoing connection selected
+		// in such mailbox then might panic because of non-existing bucket.
+		// Closing connetions prevents that panic but if the connection
+		// asked for deletion, it should not be closed so it can receive
+		// successful response.
+		storeMailbox.store.user.CloseAllConnections()
+	}
 	return storeMailbox.db().Update(func(tx *bolt.Tx) error {
 		return tx.Bucket(mailboxesBucket).DeleteBucket(storeMailbox.getBucketName())
 	})
--- a/internal/store/mailbox_message.go
+++ b/internal/store/mailbox_message.go
@ -18,6 +18,8 @@
 package store

 import (
+	"time"
+
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@ -501,7 +503,7 @@ func (storeMailbox *Mailbox) txMarkMessagesAsDeleted(tx *bolt.Tx, apiIDs []strin

 		// In order to send flags in format
 		// S: * 2 FETCH (FLAGS (\Deleted \Seen))
-		storeMailbox.store.imapUpdateMessage(
+		update := storeMailbox.store.imapUpdateMessage(
 			storeMailbox.storeAddress.address,
 			storeMailbox.labelName,
 			uid,
@ -509,6 +511,14 @@ func (storeMailbox *Mailbox) txMarkMessagesAsDeleted(tx *bolt.Tx, apiIDs []strin
 			msg,
 			markAsDeleted,
 		)
+
+		// txMarkMessagesAsDeleted is called only during processing request
+		// from IMAP call (i.e., not from event loop) and in such cases we
+		// have to wait to propagate update back before closing the response.
+		select {
+		case <-time.After(1 * time.Second):
+		case <-update.Done():
+		}
 	}

 	return nil
--- a/internal/store/mocks/mocks.go
+++ b/internal/store/mocks/mocks.go
@ -5,9 +5,10 @@
 package mocks

 import (
+	reflect "reflect"
+
 	pmapi "github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	gomock "github.com/golang/mock/gomock"
-	reflect "reflect"
 )

 // MockPanicHandler is a mock of PanicHandler interface
@ -105,6 +106,18 @@ func (m *MockBridgeUser) EXPECT() *MockBridgeUserMockRecorder {
 	return m.recorder
 }

+// CloseAllConnections mocks base method
+func (m *MockBridgeUser) CloseAllConnections() {
+	m.ctrl.T.Helper()
+	m.ctrl.Call(m, "CloseAllConnections")
+}
+
+// CloseAllConnections indicates an expected call of CloseAllConnections
+func (mr *MockBridgeUserMockRecorder) CloseAllConnections() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "CloseAllConnections", reflect.TypeOf((*MockBridgeUser)(nil).CloseAllConnections))
+}
+
 // CloseConnection mocks base method
 func (m *MockBridgeUser) CloseConnection(arg0 string) {
 	m.ctrl.T.Helper()
--- a/internal/store/mocks/utils_mocks.go
+++ b/internal/store/mocks/utils_mocks.go
@ -5,9 +5,10 @@
 package mocks

 import (
-	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
 	time "time"
+
+	gomock "github.com/golang/mock/gomock"
 )

 // MockListener is a mock of Listener interface
--- a/internal/store/types.go
+++ b/internal/store/types.go
@ -36,6 +36,7 @@ type BridgeUser interface {
 	GetPrimaryAddress() string
 	GetStoreAddresses() []string
 	UpdateUser() error
+	CloseAllConnections()
 	CloseConnection(string)
 	Logout() error
 }
--- a/internal/transfer/message.go
+++ b/internal/transfer/message.go
@ -58,6 +58,7 @@ type MessageStatus struct {
 	targetID    string    // Message ID at the target (if any).
 	bodyHash    string    // Hash of the message body.

+	skipped   bool
 	exported  bool
 	imported  bool
 	exportErr error
@ -96,7 +97,7 @@ func (status *MessageStatus) setDetailsFromHeader(header mail.Header) {
 }

 func (status *MessageStatus) hasError(includeMissing bool) bool {
-	return status.exportErr != nil || status.importErr != nil || (includeMissing && !status.imported)
+	return status.exportErr != nil || status.importErr != nil || (includeMissing && !status.skipped && !status.imported)
 }

 // GetErrorMessage returns error message.
@ -105,6 +106,9 @@ func (status *MessageStatus) GetErrorMessage() string {
 }

 func (status *MessageStatus) getErrorMessage(includeMissing bool) string {
+	if status.skipped {
+		return ""
+	}
 	if status.exportErr != nil {
 		return fmt.Sprintf("failed to export: %s", status.exportErr)
 	}
--- a/internal/transfer/mocks/mocks.go
+++ b/internal/transfer/mocks/mocks.go
@ -1,13 +1,16 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: github.com/ProtonMail/proton-bridge/internal/transfer (interfaces: PanicHandler,ClientManager)
+// Source: github.com/ProtonMail/proton-bridge/internal/transfer (interfaces: PanicHandler,ClientManager,IMAPClientProvider)

 // Package mocks is a generated GoMock package.
 package mocks

 import (
-	pmapi "github.com/ProtonMail/proton-bridge/pkg/pmapi"
-	gomock "github.com/golang/mock/gomock"
 	reflect "reflect"
+
+	pmapi "github.com/ProtonMail/proton-bridge/pkg/pmapi"
+	imap "github.com/emersion/go-imap"
+	sasl "github.com/emersion/go-sasl"
+	gomock "github.com/golang/mock/gomock"
 )

 // MockPanicHandler is a mock of PanicHandler interface
@ -95,3 +98,170 @@ func (mr *MockClientManagerMockRecorder) GetClient(arg0 interface{}) *gomock.Cal
 	mr.mock.ctrl.T.Helper()
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetClient", reflect.TypeOf((*MockClientManager)(nil).GetClient), arg0)
 }
+
+// MockIMAPClientProvider is a mock of IMAPClientProvider interface
+type MockIMAPClientProvider struct {
+	ctrl     *gomock.Controller
+	recorder *MockIMAPClientProviderMockRecorder
+}
+
+// MockIMAPClientProviderMockRecorder is the mock recorder for MockIMAPClientProvider
+type MockIMAPClientProviderMockRecorder struct {
+	mock *MockIMAPClientProvider
+}
+
+// NewMockIMAPClientProvider creates a new mock instance
+func NewMockIMAPClientProvider(ctrl *gomock.Controller) *MockIMAPClientProvider {
+	mock := &MockIMAPClientProvider{ctrl: ctrl}
+	mock.recorder = &MockIMAPClientProviderMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use
+func (m *MockIMAPClientProvider) EXPECT() *MockIMAPClientProviderMockRecorder {
+	return m.recorder
+}
+
+// Authenticate mocks base method
+func (m *MockIMAPClientProvider) Authenticate(arg0 sasl.Client) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Authenticate", arg0)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Authenticate indicates an expected call of Authenticate
+func (mr *MockIMAPClientProviderMockRecorder) Authenticate(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Authenticate", reflect.TypeOf((*MockIMAPClientProvider)(nil).Authenticate), arg0)
+}
+
+// Capability mocks base method
+func (m *MockIMAPClientProvider) Capability() (map[string]bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Capability")
+	ret0, _ := ret[0].(map[string]bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Capability indicates an expected call of Capability
+func (mr *MockIMAPClientProviderMockRecorder) Capability() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Capability", reflect.TypeOf((*MockIMAPClientProvider)(nil).Capability))
+}
+
+// Fetch mocks base method
+func (m *MockIMAPClientProvider) Fetch(arg0 *imap.SeqSet, arg1 []imap.FetchItem, arg2 chan *imap.Message) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Fetch", arg0, arg1, arg2)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Fetch indicates an expected call of Fetch
+func (mr *MockIMAPClientProviderMockRecorder) Fetch(arg0, arg1, arg2 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Fetch", reflect.TypeOf((*MockIMAPClientProvider)(nil).Fetch), arg0, arg1, arg2)
+}
+
+// List mocks base method
+func (m *MockIMAPClientProvider) List(arg0, arg1 string, arg2 chan *imap.MailboxInfo) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "List", arg0, arg1, arg2)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// List indicates an expected call of List
+func (mr *MockIMAPClientProviderMockRecorder) List(arg0, arg1, arg2 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "List", reflect.TypeOf((*MockIMAPClientProvider)(nil).List), arg0, arg1, arg2)
+}
+
+// Login mocks base method
+func (m *MockIMAPClientProvider) Login(arg0, arg1 string) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Login", arg0, arg1)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// Login indicates an expected call of Login
+func (mr *MockIMAPClientProviderMockRecorder) Login(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Login", reflect.TypeOf((*MockIMAPClientProvider)(nil).Login), arg0, arg1)
+}
+
+// Select mocks base method
+func (m *MockIMAPClientProvider) Select(arg0 string, arg1 bool) (*imap.MailboxStatus, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Select", arg0, arg1)
+	ret0, _ := ret[0].(*imap.MailboxStatus)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Select indicates an expected call of Select
+func (mr *MockIMAPClientProviderMockRecorder) Select(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Select", reflect.TypeOf((*MockIMAPClientProvider)(nil).Select), arg0, arg1)
+}
+
+// State mocks base method
+func (m *MockIMAPClientProvider) State() imap.ConnState {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "State")
+	ret0, _ := ret[0].(imap.ConnState)
+	return ret0
+}
+
+// State indicates an expected call of State
+func (mr *MockIMAPClientProviderMockRecorder) State() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "State", reflect.TypeOf((*MockIMAPClientProvider)(nil).State))
+}
+
+// Support mocks base method
+func (m *MockIMAPClientProvider) Support(arg0 string) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "Support", arg0)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// Support indicates an expected call of Support
+func (mr *MockIMAPClientProviderMockRecorder) Support(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Support", reflect.TypeOf((*MockIMAPClientProvider)(nil).Support), arg0)
+}
+
+// SupportAuth mocks base method
+func (m *MockIMAPClientProvider) SupportAuth(arg0 string) (bool, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "SupportAuth", arg0)
+	ret0, _ := ret[0].(bool)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// SupportAuth indicates an expected call of SupportAuth
+func (mr *MockIMAPClientProviderMockRecorder) SupportAuth(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SupportAuth", reflect.TypeOf((*MockIMAPClientProvider)(nil).SupportAuth), arg0)
+}
+
+// UidFetch mocks base method
+func (m *MockIMAPClientProvider) UidFetch(arg0 *imap.SeqSet, arg1 []imap.FetchItem, arg2 chan *imap.Message) error {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "UidFetch", arg0, arg1, arg2)
+	ret0, _ := ret[0].(error)
+	return ret0
+}
+
+// UidFetch indicates an expected call of UidFetch
+func (mr *MockIMAPClientProviderMockRecorder) UidFetch(arg0, arg1, arg2 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "UidFetch", reflect.TypeOf((*MockIMAPClientProvider)(nil).UidFetch), arg0, arg1, arg2)
+}
--- a/internal/transfer/progress.go
+++ b/internal/transfer/progress.go
@ -140,6 +140,19 @@ func (p *Progress) addMessage(messageID string, sourceNames, targetNames []strin
 	}
 }

+// messageSkipped should be called once the message is skipped due to some
+// filter such as time or folder and so on.
+func (p *Progress) messageSkipped(messageID string) {
+	p.lock.Lock()
+	defer p.lock.Unlock()
+	defer p.update()
+
+	p.log.WithField("id", messageID).Debug("Message skipped")
+
+	p.messageStatuses[messageID].skipped = true
+	p.logMessage(messageID)
+}
+
 // messageExported should be called right before message is exported.
 func (p *Progress) messageExported(messageID string, body []byte, err error) {
 	p.lock.Lock()
@ -330,35 +343,40 @@ func (p *Progress) GetFailedMessages() []*MessageStatus {
 }

 // GetCounts returns counts of exported and imported messages.
-func (p *Progress) GetCounts() (failed, imported, exported, added, total uint) {
+func (p *Progress) GetCounts() ProgressCounts {
 	p.lock.Lock()
 	defer p.lock.Unlock()

+	counts := ProgressCounts{}
+
 	// Return counts only once total is estimated or the process already
 	// ended (for a case when it ended quickly to report it correctly).
 	if p.updateCh != nil && !p.messageCounted {
-		return
+		return counts
 	}

 	// Include lost messages in the process only when transfer is done.
 	includeMissing := p.updateCh == nil

 	for _, mailboxCount := range p.messageCounts {
-		total += mailboxCount
+		counts.Total += mailboxCount
 	}
 	for _, status := range p.messageStatuses {
-		added++
+		counts.Added++
+		if status.skipped {
+			counts.Skipped++
+		}
 		if status.exported {
-			exported++
+			counts.Exported++
 		}
 		if status.imported {
-			imported++
+			counts.Imported++
 		}
 		if status.hasError(includeMissing) {
-			failed++
+			counts.Failed++
 		}
 	}
-	return
+	return counts
 }

 // GenerateBugReport generates similar file to import log except private information.
--- a/internal/transfer/progress_counts.go
+++ b/internal/transfer/progress_counts.go
@ -0,0 +1,35 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package transfer
+
+// ProgressCounts holds counts counted by Progress.
+type ProgressCounts struct {
+	Failed,
+	Skipped,
+	Imported,
+	Exported,
+	Added,
+	Total uint
+}
+
+// Progress returns ratio between processed messages (fully imported, skipped
+// and failed ones) and total number of messages as percentage (0 - 1).
+func (c *ProgressCounts) Progress() float32 {
+	progressed := c.Imported + c.Skipped + c.Failed
+	return float32(progressed) / float32(c.Total)
+}
--- a/internal/transfer/progress_test.go
+++ b/internal/transfer/progress_test.go
@ -39,8 +39,8 @@ func TestProgressUpdateCount(t *testing.T) {

 	progress.finish()

-	_, _, _, _, total := progress.GetCounts() //nolint[dogsled]
-	r.Equal(t, uint(42), total)
+	counts := progress.GetCounts()
+	r.Equal(t, uint(42), counts.Total)
 }

 func TestProgressAddingMessages(t *testing.T) {
@ -66,13 +66,18 @@ func TestProgressAddingMessages(t *testing.T) {
 	progress.messageExported("msg4", []byte(""), errors.New("failed export"))
 	progress.messageImported("msg4", "", nil)

+	// msg5 is skipped.
+	progress.addMessage("msg5", []string{}, []string{})
+	progress.messageSkipped("msg5")
+
 	progress.finish()

-	failed, imported, exported, added, _ := progress.GetCounts()
-	a.Equal(t, uint(4), added)
-	a.Equal(t, uint(2), exported)
-	a.Equal(t, uint(2), imported)
-	a.Equal(t, uint(3), failed)
+	counts := progress.GetCounts()
+	a.Equal(t, uint(5), counts.Added)
+	a.Equal(t, uint(2), counts.Exported)
+	a.Equal(t, uint(2), counts.Imported)
+	a.Equal(t, uint(1), counts.Skipped)
+	a.Equal(t, uint(3), counts.Failed)

 	errorsMap := map[string]string{}
 	for _, status := range progress.GetFailedMessages() {
--- a/internal/transfer/provider_eml_source.go
+++ b/internal/transfer/provider_eml_source.go
@ -82,8 +82,6 @@ func (p *EMLProvider) getFilePathsPerFolder(rules transferRules) (map[string][]s
 }

 func (p *EMLProvider) exportMessages(rule *Rule, filePaths []string, progress *Progress, ch chan<- Message) {
-	count := uint(len(filePaths))
-
 	for _, filePath := range filePaths {
 		if progress.shouldStop() {
 			break
@ -91,6 +89,8 @@ func (p *EMLProvider) exportMessages(rule *Rule, filePaths []string, progress *P

 		msg, err := p.exportMessage(rule, filePath)

+		progress.addMessage(filePath, msg.sourceNames(), msg.targetNames())
+
 		// Read and check time in body only if the rule specifies it
 		// to not waste energy.
 		if err == nil && rule.HasTimeLimit() {
@ -99,17 +99,11 @@ func (p *EMLProvider) exportMessages(rule *Rule, filePaths []string, progress *P
 				err = msgTimeErr
 			} else if !rule.isTimeInRange(msgTime) {
 				log.WithField("msg", filePath).Debug("Message skipped due to time")
-
-				count--
-				progress.updateCount(rule.SourceMailbox.Name, count)
+				progress.messageSkipped(filePath)
 				continue
 			}
 		}

-		// addMessage is called after time check to not report message
-		// which should not be exported but any error from reading body
-		// or parsing time is reported as an error.
-		progress.addMessage(filePath, msg.sourceNames(), msg.targetNames())
 		progress.messageExported(filePath, msg.Body, err)
 		if err == nil {
 			ch <- msg
--- a/internal/transfer/provider_imap.go
+++ b/internal/transfer/provider_imap.go
@ -21,28 +21,49 @@ import (
 	"net"
 	"strings"

-	imapClient "github.com/emersion/go-imap/client"
+	"github.com/emersion/go-imap"
+	"github.com/emersion/go-sasl"
 )

+type IMAPClientProvider interface {
+	Capability() (map[string]bool, error)
+	Support(cap string) (bool, error)
+	State() imap.ConnState
+	SupportAuth(mech string) (bool, error)
+	Authenticate(auth sasl.Client) error
+	Login(username, password string) error
+	List(ref, name string, ch chan *imap.MailboxInfo) error
+	Select(name string, readOnly bool) (*imap.MailboxStatus, error)
+	Fetch(seqset *imap.SeqSet, items []imap.FetchItem, ch chan *imap.Message) error
+	UidFetch(seqset *imap.SeqSet, items []imap.FetchItem, ch chan *imap.Message) error
+}
+
 // IMAPProvider implements export from IMAP server.
 type IMAPProvider struct {
 	username string
 	password string
 	addr     string

-	client *imapClient.Client
+	clientDialer func(addr string) (IMAPClientProvider, error)
+	client       IMAPClientProvider

 	timeIt *timeIt
 }

 // NewIMAPProvider returns new IMAPProvider.
 func NewIMAPProvider(username, password, host, port string) (*IMAPProvider, error) {
+	return newIMAPProvider(imapClientDial, username, password, host, port)
+}
+
+func newIMAPProvider(clientDialer func(string) (IMAPClientProvider, error), username, password, host, port string) (*IMAPProvider, error) {
 	p := &IMAPProvider{
 		username: username,
 		password: password,
 		addr:     net.JoinHostPort(host, port),

 		timeIt: newTimeIt("imap"),
+
+		clientDialer: clientDialer,
 	}

 	if err := p.auth(); err != nil {
--- a/internal/transfer/provider_imap_source.go
+++ b/internal/transfer/provider_imap_source.go
@ -84,31 +84,15 @@ func (p *IMAPProvider) loadMessagesInfo(rule *Rule, progress *Progress, uidValid
 	p.timeIt.start("load", rule.SourceMailbox.Name)
 	defer p.timeIt.stop("load", rule.SourceMailbox.Name)

+	log := log.WithField("mailbox", rule.SourceMailbox.Name)
 	messagesInfo := map[string]imapMessageInfo{}

-	pageStart := uint32(1)
-	pageEnd := imapPageSize
-	for {
-		if progress.shouldStop() {
-			break
-		}
-
-		// Some servers do not accept message sequence number higher than the total count.
-		if pageEnd > count {
-			pageEnd = count
-		}
-
-		seqSet := &imap.SeqSet{}
-		seqSet.AddRange(pageStart, pageEnd)
-
-		items := []imap.FetchItem{imap.FetchUid, imap.FetchRFC822Size}
+	fetchItems := []imap.FetchItem{imap.FetchUid, imap.FetchRFC822Size}
 	if rule.HasTimeLimit() {
-			items = append(items, imap.FetchEnvelope)
+		fetchItems = append(fetchItems, imap.FetchEnvelope)
 	}

-		pageMsgCount := uint32(0)
 	processMessageCallback := func(imapMessage *imap.Message) {
-			pageMsgCount++
 		if rule.HasTimeLimit() {
 			t := imapMessage.Envelope.Date.Unix()
 			if t != 0 && !rule.isTimeInRange(t) {
@ -127,18 +111,35 @@ func (p *IMAPProvider) loadMessagesInfo(rule *Rule, progress *Progress, uidValid
 		progress.addMessage(id, []string{rule.SourceMailbox.Name}, rule.TargetMailboxNames())
 	}

-		progress.callWrap(func() error {
-			return p.fetch(rule.SourceMailbox.Name, seqSet, items, processMessageCallback)
-		})
-
-		if pageMsgCount < imapPageSize {
+	pageStart := uint32(1)
+	pageEnd := imapPageSize
+	for {
+		if progress.shouldStop() || pageStart > count {
 			break
 		}

-		pageStart = pageEnd
-		pageEnd += imapPageSize
+		// Some servers do not accept message sequence number higher than the total count.
+		if pageEnd > count {
+			pageEnd = count
 		}

+		seqSet := &imap.SeqSet{}
+		seqSet.AddRange(pageStart, pageEnd)
+		err := p.fetch(rule.SourceMailbox.Name, seqSet, fetchItems, processMessageCallback)
+		if err != nil {
+			log.WithError(err).WithField("idx", seqSet).Warning("Load batch fetch failed, trying one by one")
+			for ; pageStart <= pageEnd; pageStart++ {
+				seqSet := &imap.SeqSet{}
+				seqSet.AddNum(pageStart)
+				if err := p.fetch(rule.SourceMailbox.Name, seqSet, fetchItems, processMessageCallback); err != nil {
+					log.WithError(err).WithField("idx", seqSet).Warning("Load fetch failed, skipping the message")
+				}
+			}
+		}
+
+		pageStart = pageEnd + 1
+		pageEnd += imapPageSize
+	}
 	return messagesInfo
 }

--- a/internal/transfer/provider_imap_test.go
+++ b/internal/transfer/provider_imap_test.go
@ -0,0 +1,100 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package transfer
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/emersion/go-imap"
+	gomock "github.com/golang/mock/gomock"
+	"github.com/pkg/errors"
+	r "github.com/stretchr/testify/require"
+)
+
+func newTestIMAPProvider(t *testing.T, m mocks) *IMAPProvider {
+	m.imapClientProvider.EXPECT().State().Return(imap.ConnectedState).AnyTimes()
+	m.imapClientProvider.EXPECT().Capability().Return(map[string]bool{
+		"AUTH": true,
+	}, nil).AnyTimes()
+
+	dialer := func(string) (IMAPClientProvider, error) {
+		return m.imapClientProvider, nil
+	}
+	provider, err := newIMAPProvider(dialer, "user", "pass", "host", "42")
+	r.NoError(t, err)
+	return provider
+}
+
+func TestProviderIMAPLoadMessagesInfo(t *testing.T) {
+	m := initMocks(t)
+	defer m.ctrl.Finish()
+
+	provider := newTestIMAPProvider(t, m)
+
+	progress := newProgress(log, nil)
+	drainProgressUpdateChannel(&progress)
+
+	rule := &Rule{SourceMailbox: Mailbox{Name: "Mailbox"}}
+	uidValidity := 1
+	count := 2200
+	failingIndex := 2100
+
+	m.imapClientProvider.EXPECT().Select(rule.SourceMailbox.Name, gomock.Any()).Return(&imap.MailboxStatus{}, nil).AnyTimes()
+	m.imapClientProvider.EXPECT().
+		Fetch(gomock.Any(), gomock.Any(), gomock.Any()).
+		DoAndReturn(func(seqSet *imap.SeqSet, items []imap.FetchItem, ch chan *imap.Message) error {
+			defer close(ch)
+			for _, seq := range seqSet.Set {
+				for i := seq.Start; i <= seq.Stop; i++ {
+					if int(i) == failingIndex {
+						return errors.New("internal server error")
+					}
+					ch <- &imap.Message{
+						SeqNum: i,
+						Uid:    i * 10,
+						Size:   i * 100,
+					}
+				}
+			}
+			return nil
+		}).
+		// 2200 messages is split into two batches (2000 and 200),
+		// the second one fails and makes 200 calls (one-by-one).
+		// Plus two failed requests are repeated `imapRetries` times.
+		Times(2 + 200 + (2 * (imapRetries - 1)))
+
+	messageInfo := provider.loadMessagesInfo(rule, &progress, uint32(uidValidity), uint32(count))
+
+	r.Equal(t, count-1, len(messageInfo)) // One message produces internal server error.
+	for index := 1; index <= count; index++ {
+		uid := index * 10
+		key := fmt.Sprintf("%s_%d:%d", rule.SourceMailbox.Name, uidValidity, uid)
+
+		if index == failingIndex {
+			r.Empty(t, messageInfo[key])
+			continue
+		}
+
+		r.Equal(t, imapMessageInfo{
+			id:   key,
+			uid:  uint32(uid),
+			size: uint32(index * 100),
+		}, messageInfo[key])
+	}
+}
--- a/internal/transfer/provider_imap_utils.go
+++ b/internal/transfer/provider_imap_utils.go
@ -24,10 +24,11 @@ import (
 	"time"

 	imapID "github.com/ProtonMail/go-imap-id"
+	"github.com/ProtonMail/proton-bridge/pkg/constants"
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	"github.com/emersion/go-imap"
 	imapClient "github.com/emersion/go-imap/client"
-	sasl "github.com/emersion/go-sasl"
+	"github.com/emersion/go-sasl"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
 )
@ -51,6 +52,43 @@ func (l *imapErrorLogger) Println(v ...interface{}) {
 	l.log.Errorln(v...)
 }

+func imapClientDial(addr string) (IMAPClientProvider, error) {
+	if _, err := net.DialTimeout("tcp", addr, imapDialTimeout); err != nil {
+		return nil, errors.Wrap(err, "failed to dial server")
+	}
+
+	client, err := imapClientDialHelper(addr)
+	if err == nil {
+		client.ErrorLog = &imapErrorLogger{logrus.WithField("pkg", "imap-client")}
+		// Logrus `WriterLevel` fails for big messages because of bufio.MaxScanTokenSize limit.
+		// Also, this spams a lot, uncomment once needed during development.
+		//client.SetDebug(imap.NewDebugWriter(
+		//	logrus.WithField("pkg", "imap/client").WriterLevel(logrus.TraceLevel),
+		//	logrus.WithField("pkg", "imap/server").WriterLevel(logrus.TraceLevel),
+		//))
+	}
+	return client, err
+}
+
+func imapClientDialHelper(addr string) (*imapClient.Client, error) {
+	host, _, _ := net.SplitHostPort(addr)
+	if host == "127.0.0.1" {
+		return imapClient.Dial(addr)
+	}
+
+	// IMAP mail.yahoo.com has problem with golang TLS 1.3 implementation
+	// with weird behaviour, i.e., Yahoo does not return error during dial
+	// or handshake but server does logs out right after successful login
+	// leaving no time to perform any action.
+	// Limiting TLS to version 1.2 is working just fine.
+	var tlsConf *tls.Config
+	if strings.Contains(strings.ToLower(host), "yahoo") {
+		log.Warning("Yahoo server detected: limiting maximal TLS version to 1.2.")
+		tlsConf = &tls.Config{MaxVersion: tls.VersionTLS12}
+	}
+	return imapClient.DialTLS(addr, tlsConf)
+}
+
 func (p *IMAPProvider) ensureConnection(callback func() error) error {
 	return p.ensureConnectionAndSelection(callback, "")
 }
@ -138,41 +176,10 @@ func (p *IMAPProvider) auth() error { //nolint[funlen]

 	log.Info("Connecting to server")

-	if _, err := net.DialTimeout("tcp", p.addr, imapDialTimeout); err != nil {
-		return ErrIMAPConnection{imapError{Err: err, Message: "failed to dial server"}}
-	}
-
-	var client *imapClient.Client
-	var err error
-	host, _, _ := net.SplitHostPort(p.addr)
-	if host == "127.0.0.1" {
-		client, err = imapClient.Dial(p.addr)
-	} else {
-		// IMAP.mail.yahoo.com have problem with golang TLS1.3
-		// implementation with weird behaviour i.e. Yahoo
-		// no error during dial or handshake but server logs out right
-		// after successful login leaving no time to perform any
-		// action. It was discovered that limiting to maximum TLS
-		// version 1.2 for yahoo servers is working solution.
-
-		var tlsConf *tls.Config
-		if strings.Contains(strings.ToLower(host), "yahoo") {
-			log.Warning("Yahoo server detected: limiting maximal TLS version to 1.2.")
-			tlsConf = &tls.Config{MaxVersion: tls.VersionTLS12}
-		}
-		client, err = imapClient.DialTLS(p.addr, tlsConf)
-	}
+	client, err := p.clientDialer(p.addr)
 	if err != nil {
 		return ErrIMAPConnection{imapError{Err: err, Message: "failed to connect to server"}}
 	}
-
-	client.ErrorLog = &imapErrorLogger{logrus.WithField("pkg", "imap-client")}
-	// Logrus `WriterLevel` fails for big messages because of bufio.MaxScanTokenSize limit.
-	// Also, this spams a lot, uncomment once needed during development.
-	//client.SetDebug(imap.NewDebugWriter(
-	//	logrus.WithField("pkg", "imap/client").WriterLevel(logrus.TraceLevel),
-	//	logrus.WithField("pkg", "imap/server").WriterLevel(logrus.TraceLevel),
-	//))
 	p.client = client

 	log.Info("Connected")
@ -210,14 +217,16 @@ func (p *IMAPProvider) auth() error { //nolint[funlen]

 	log.Info("Logged in")

-	idClient := imapID.NewClient(p.client)
+	if c, ok := p.client.(*imapClient.Client); ok {
+		idClient := imapID.NewClient(c)
 		if ok, err := idClient.SupportID(); err == nil && ok {
 			serverID, err := idClient.ID(imapID.ID{
 				imapID.FieldName:    "ImportExport",
-			imapID.FieldVersion: "beta",
+				imapID.FieldVersion: constants.Version,
 			})
 			log.WithField("ID", serverID).WithError(err).Debug("Server info")
 		}
+	}

 	return err
 }
--- a/internal/transfer/provider_mbox_source.go
+++ b/internal/transfer/provider_mbox_source.go
@ -114,7 +114,6 @@ func (p *MBOXProvider) transferTo(rules transferRules, progress *Progress, ch ch
 	}

 	index := 0
-	count := 0
 	for {
 		if progress.shouldStop() {
 			break
@ -133,24 +132,18 @@ func (p *MBOXProvider) transferTo(rules transferRules, progress *Progress, ch ch

 		msg, err := p.exportMessage(rules, folderName, id, msgReader)

+		progress.addMessage(id, msg.sourceNames(), msg.targetNames())
+
 		if err == nil && len(msg.Targets) == 0 {
-			// Here should be called progress.messageSkipped(id) once we have
-			// this feature, and following progress.updateCount can be removed.
+			progress.messageSkipped(id)
 			continue
 		}

-		count++
-
-		// addMessage is called after time check to not report message
-		// which should not be exported but any error from reading body
-		// or parsing time is reported as an error.
-		progress.addMessage(id, msg.sourceNames(), msg.targetNames())
 		progress.messageExported(id, msg.Body, err)
 		if err == nil {
 			ch <- msg
 		}
 	}
-	progress.updateCount(filePath, uint(count))
 }

 func (p *MBOXProvider) exportMessage(rules transferRules, folderName, id string, msgReader io.Reader) (Message, error) {
@ -177,7 +170,7 @@ func (p *MBOXProvider) getMessageRules(rules transferRules, folderName, id strin
 	folderRule, err := rules.getRuleBySourceMailboxName(folderName)
 	if err != nil {
 		log.WithField("msg", id).WithField("source", folderName).Debug("Message source doesn't have a rule")
-	} else {
+	} else if folderRule.Active {
 		msgRules = append(msgRules, folderRule)
 	}

@ -191,9 +184,11 @@ func (p *MBOXProvider) getMessageRules(rules transferRules, folderName, id strin
 				log.WithField("msg", id).WithField("source", label).Debug("Message source doesn't have a rule")
 				continue
 			}
+			if rule.Active {
 				msgRules = append(msgRules, rule)
 			}
 		}
+	}

 	return msgRules
 }
--- a/internal/transfer/provider_mbox_test.go
+++ b/internal/transfer/provider_mbox_test.go
@ -155,6 +155,29 @@ func TestMBOXProviderTransferFromTo(t *testing.T) {
 	})
 }

+func TestMBOXProviderGetMessageRules(t *testing.T) {
+	provider := newTestMBOXProvider("")
+
+	body := []byte(`Subject: Test
+X-Gmail-Labels: foo,bar
+
+`)
+	rules := transferRules{
+		rules: map[string]*Rule{
+			"1": {Active: true, SourceMailbox: Mailbox{Name: "folder"}},
+			"2": {Active: false, SourceMailbox: Mailbox{Name: "foo"}},
+			"3": {Active: true, SourceMailbox: Mailbox{Name: "bar"}},
+			"4": {Active: false, SourceMailbox: Mailbox{Name: "baz"}},
+			"5": {Active: true, SourceMailbox: Mailbox{Name: "other"}},
+		},
+	}
+
+	gotRules := provider.getMessageRules(rules, "folder", "id", body)
+	r.Equal(t, 2, len(gotRules))
+	r.Equal(t, "folder", gotRules[0].SourceMailbox.Name)
+	r.Equal(t, "bar", gotRules[1].SourceMailbox.Name)
+}
+
 func TestMBOXProviderGetMessageTargetsReturnsOnlyOneFolder(t *testing.T) {
 	provider := newTestMBOXProvider("")

--- a/internal/transfer/transfer_test.go
+++ b/internal/transfer/transfer_test.go
@ -34,6 +34,7 @@ type mocks struct {
 	ctrl               *gomock.Controller
 	panicHandler       *transfermocks.MockPanicHandler
 	clientManager      *transfermocks.MockClientManager
+	imapClientProvider *transfermocks.MockIMAPClientProvider
 	pmapiClient        *pmapimocks.MockClient
 	pmapiConfig        *pmapi.ClientConfig

@ -49,6 +50,7 @@ func initMocks(t *testing.T) mocks {
 		ctrl:               mockCtrl,
 		panicHandler:       transfermocks.NewMockPanicHandler(mockCtrl),
 		clientManager:      transfermocks.NewMockClientManager(mockCtrl),
+		imapClientProvider: transfermocks.NewMockIMAPClientProvider(mockCtrl),
 		pmapiClient:        pmapimocks.NewMockClient(mockCtrl),
 		pmapiConfig:        &pmapi.ClientConfig{},
 		keyring:            newTestKeyring(),
--- a/internal/transfer/utils.go
+++ b/internal/transfer/utils.go
@ -28,6 +28,7 @@ import (
 	"sort"
 	"strings"

+	"github.com/ProtonMail/go-rfc5322"
 	"github.com/pkg/errors"
 )

@ -136,14 +137,21 @@ func getFilePathsWithSuffixInner(prefix, root, suffix string, includeDir bool) (

 // getMessageTime returns time of the message specified in the message header.
 func getMessageTime(body []byte) (int64, error) {
-	mailHeader, err := getMessageHeader(body)
+	hdr, err := getMessageHeader(body)
 	if err != nil {
 		return 0, err
 	}
-	if t, err := mailHeader.Date(); err == nil && !t.IsZero() {
-		return t.Unix(), nil
+
+	t, err := rfc5322.ParseDateTime(hdr.Get("Date"))
+	if err != nil {
+		return 0, err
 	}
+
+	if t.IsZero() {
 		return 0, nil
+	}
+
+	return t.Unix(), nil
 }

 // getMessageHeader returns headers of the message body.
--- a/internal/users/mocks/mocks.go
+++ b/internal/users/mocks/mocks.go
@ -5,11 +5,12 @@
 package mocks

 import (
+	reflect "reflect"
+
 	store "github.com/ProtonMail/proton-bridge/internal/store"
 	credentials "github.com/ProtonMail/proton-bridge/internal/users/credentials"
 	pmapi "github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	gomock "github.com/golang/mock/gomock"
-	reflect "reflect"
 )

 // MockConfiger is a mock of Configer interface
--- a/internal/users/user.go
+++ b/internal/users/user.go
@ -437,7 +437,7 @@ func (u *User) SwitchAddressMode() (err error) {

 	u.lock.Lock()
 	defer u.lock.Unlock()
-	u.closeAllConnections()
+	u.CloseAllConnections()

 	if u.store == nil {
 		err = errors.New("store is not initialised")
@ -509,7 +509,7 @@ func (u *User) Logout() (err error) {
 	// Do not close whole store, just event loop. Some information might be needed offline (e.g. addressID)
 	u.closeEventLoop()

-	u.closeAllConnections()
+	u.CloseAllConnections()

 	runtime.GC()

@ -532,8 +532,8 @@ func (u *User) closeEventLoop() {
 	u.store.CloseEventLoop()
 }

-// closeAllConnections calls CloseConnection for all users addresses.
-func (u *User) closeAllConnections() {
+// CloseAllConnections calls CloseConnection for all users addresses.
+func (u *User) CloseAllConnections() {
 	for _, address := range u.creds.EmailList() {
 		u.CloseConnection(address)
 	}
--- a/internal/users/users.go
+++ b/internal/users/users.go
@ -186,7 +186,7 @@ func (u *Users) watchAPIAuths() {

 func (u *Users) closeAllConnections() {
 	for _, user := range u.users {
-		user.closeAllConnections()
+		user.CloseAllConnections()
 	}
 }

--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@ -21,6 +21,7 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
+	"runtime"

 	"github.com/ProtonMail/go-appdir"
 	"github.com/hashicorp/go-multierror"
@ -247,3 +248,17 @@ func (c *Config) GetDefaultIMAPPort() int {
 func (c *Config) GetDefaultSMTPPort() int {
 	return 1025
 }
+
+// getAPIOS returns actual operating system.
+func (c *Config) getAPIOS() string {
+	switch os := runtime.GOOS; os {
+	case "darwin": // nolint: goconst
+		return "macOS"
+	case "linux":
+		return "Linux"
+	case "windows":
+		return "Windows"
+	}
+
+	return "Linux"
+}
--- a/pkg/config/pmapi_noprod.go
+++ b/pkg/config/pmapi_noprod.go
@ -29,7 +29,7 @@ import (

 func (c *Config) GetAPIConfig() *pmapi.ClientConfig {
 	return &pmapi.ClientConfig{
-		AppVersion: strings.Title(c.appName) + "_" + c.version,
+		AppVersion: c.getAPIOS() + strings.Title(c.appName) + "_" + c.version,
 		ClientID:   c.appName,
 	}
 }
--- a/pkg/config/pmapi_prod.go
+++ b/pkg/config/pmapi_prod.go
@ -31,7 +31,7 @@ import (

 func (c *Config) GetAPIConfig() *pmapi.ClientConfig {
 	return &pmapi.ClientConfig{
-		AppVersion:        strings.Title(c.appName) + "_" + c.version,
+		AppVersion:        c.getAPIOS() + strings.Title(c.appName) + "_" + c.version,
 		ClientID:          c.appName,
 		Timeout:           25 * time.Minute, // Overall request timeout (~25MB / 25 mins => ~16kB/s, should be reasonable).
 		FirstReadTimeout:  30 * time.Second, // 30s to match 30s response header timeout.
--- a/pkg/message/header.go
+++ b/pkg/message/header.go
@ -19,9 +19,7 @@ package message

 import (
 	"mime"
-	"net/mail"
 	"net/textproto"
-	"regexp"
 	"strings"
 	"time"

@ -86,10 +84,6 @@ func GetHeader(msg *pmapi.Message) textproto.MIMEHeader { //nolint[funlen]
 	}
 	if msg.ConversationID != "" {
 		h.Set("X-Pm-ConversationID-Id", msg.ConversationID)
-		if references := h.Get("References"); !strings.Contains(references, msg.ConversationID) {
-			references += " <" + msg.ConversationID + "@" + pmapi.ConversationIDDomain + ">"
-			h.Set("References", references)
-		}
 	}

 	return h
@ -141,46 +135,3 @@ func GetAttachmentHeader(att *pmapi.Attachment) textproto.MIMEHeader {

 	return h
 }
-
-var reEmailComment = regexp.MustCompile("[(][^)]*[)]") // nolint[gochecknoglobals]
-
-// parseAddressComment removes the comments completely even though they should be allowed
-// http://tools.wordtothewise.com/rfc/822
-// NOTE: This should be supported in go>1.10 but it seems it's not ¯\_(ツ)_/¯
-func parseAddressComment(raw string) string {
-	return reEmailComment.ReplaceAllString(raw, "")
-}
-
-func parseAddressList(val string) (addrs []*mail.Address, err error) {
-	if val == "" || val == "<>" {
-		return
-	}
-
-	addrs, err = mail.ParseAddressList(parseAddressComment(val))
-	if err == nil {
-		if addrs == nil {
-			addrs = []*mail.Address{}
-		}
-		return
-	}
-
-	// Probably missing encoding error -- try to at least parse addresses in brackets.
-	first := strings.Index(val, "<")
-	last := strings.LastIndex(val, ">")
-	if first < 0 || last < 0 || first >= last {
-		return
-	}
-	var addrList []string
-	open := first
-	for open < last && 0 <= open {
-		val = val[open:]
-		close := strings.Index(val, ">")
-		addrList = append(addrList, val[:close+1])
-		val = val[close:]
-		open = strings.Index(val, "<")
-		last = strings.LastIndex(val, ">")
-	}
-	val = strings.Join(addrList, ", ")
-
-	return mail.ParseAddressList(val)
-}
--- a/pkg/message/init.go
+++ b/pkg/message/init.go
@ -0,0 +1,27 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package message
+
+import (
+	"github.com/ProtonMail/go-rfc5322"
+	pmmime "github.com/ProtonMail/proton-bridge/pkg/mime"
+)
+
+func init() { // nolint[noinit]
+	rfc5322.CharsetReader = pmmime.CharsetReader
+}
--- a/pkg/message/parser.go
+++ b/pkg/message/parser.go
@ -26,6 +26,7 @@ import (
 	"net/textproto"
 	"strings"

+	"github.com/ProtonMail/go-rfc5322"
 	"github.com/ProtonMail/proton-bridge/pkg/message/parser"
 	pmmime "github.com/ProtonMail/proton-bridge/pkg/mime"
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
@ -365,7 +366,6 @@ func attachPublicKey(p *parser.Part, key, keyName string) {
 	})
 }

-// NOTE: We should use our own ParseAddressList here.
 func parseMessageHeader(m *pmapi.Message, h message.Header) error { // nolint[funlen]
 	mimeHeader, err := toMailHeader(h)
 	if err != nil {
@ -373,59 +373,64 @@ func parseMessageHeader(m *pmapi.Message, h message.Header) error { // nolint[fu
 	}
 	m.Header = mimeHeader

-	if err := forEachDecodedHeaderField(h, func(key, val string) error {
-		switch strings.ToLower(key) {
+	fields := h.Fields()
+
+	for fields.Next() {
+		switch strings.ToLower(fields.Key()) {
 		case "subject":
-			m.Subject = val
+			s, err := fields.Text()
+			if err != nil {
+				if s, err = pmmime.DecodeHeader(fields.Value()); err != nil {
+					return errors.Wrap(err, "failed to parse subject")
+				}
+			}
+
+			m.Subject = s

 		case "from":
-			sender, err := parseAddressList(val)
+			sender, err := rfc5322.ParseAddressList(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse from")
 			}
 			if len(sender) > 0 {
 				m.Sender = sender[0]
 			}

 		case "to":
-			toList, err := parseAddressList(val)
+			toList, err := rfc5322.ParseAddressList(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse to")
 			}
 			m.ToList = toList

 		case "reply-to":
-			replyTos, err := parseAddressList(val)
+			replyTos, err := rfc5322.ParseAddressList(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse reply-to")
 			}
 			m.ReplyTos = replyTos

 		case "cc":
-			ccList, err := parseAddressList(val)
+			ccList, err := rfc5322.ParseAddressList(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse cc")
 			}
 			m.CCList = ccList

 		case "bcc":
-			bccList, err := parseAddressList(val)
+			bccList, err := rfc5322.ParseAddressList(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse bcc")
 			}
 			m.BCCList = bccList

 		case "date":
-			date, err := mail.ParseDate(val)
+			date, err := rfc5322.ParseDateTime(fields.Value())
 			if err != nil {
-				return err
+				return errors.Wrap(err, "failed to parse date")
 			}
 			m.Time = date.Unix()
 		}
-
-		return nil
-	}); err != nil {
-		return err
 	}

 	return nil
@ -469,29 +474,6 @@ func parseAttachment(h message.Header) (*pmapi.Attachment, error) {
 	return att, nil
 }

-func forEachDecodedHeaderField(h message.Header, fn func(string, string) error) error {
-	fields := h.Fields()
-
-	for fields.Next() {
-		text, err := fields.Text()
-		if err != nil {
-			if !message.IsUnknownCharset(err) {
-				return err
-			}
-
-			if text, err = pmmime.DecodeHeader(fields.Value()); err != nil {
-				return err
-			}
-		}
-
-		if err := fn(fields.Key(), text); err != nil {
-			return err
-		}
-	}
-
-	return nil
-}
-
 func toMailHeader(h message.Header) (mail.Header, error) {
 	mimeHeader := make(mail.Header)

@ -517,3 +499,26 @@ func toMIMEHeader(h message.Header) (textproto.MIMEHeader, error) {

 	return mimeHeader, nil
 }
+
+func forEachDecodedHeaderField(h message.Header, fn func(string, string) error) error {
+	fields := h.Fields()
+
+	for fields.Next() {
+		text, err := fields.Text()
+		if err != nil {
+			if !message.IsUnknownCharset(err) {
+				return err
+			}
+
+			if text, err = pmmime.DecodeHeader(fields.Value()); err != nil {
+				return err
+			}
+		}
+
+		if err := fn(fields.Key(), text); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
--- a/pkg/message/parser_test.go
+++ b/pkg/message/parser_test.go
@ -498,80 +498,3 @@ func readerToString(r io.Reader) string {

 	return string(b)
 }
-
-func TestRFC822AddressFormat(t *testing.T) { //nolint[funlen]
-	tests := []struct {
-		address  string
-		expected []string
-	}{
-		{
-			" normal name  <username@server.com>",
-			[]string{
-				"\"normal name\" <username@server.com>",
-			},
-		},
-		{
-			" \"comma, name\"  <username@server.com>",
-			[]string{
-				"\"comma, name\" <username@server.com>",
-			},
-		},
-		{
-			" name  <username@server.com> (ignore comment)",
-			[]string{
-				"\"name\" <username@server.com>",
-			},
-		},
-		{
-			" name (ignore comment)  <username@server.com>,  (Comment as name) username2@server.com",
-			[]string{
-				"\"name\" <username@server.com>",
-				"<username2@server.com>",
-			},
-		},
-		{
-			" normal name  <username@server.com>, (comment)All.(around)address@(the)server.com",
-			[]string{
-				"\"normal name\" <username@server.com>",
-				"<All.address@server.com>",
-			},
-		},
-		{
-			" normal name  <username@server.com>, All.(\"comma, in comment\")address@(the)server.com",
-			[]string{
-				"\"normal name\" <username@server.com>",
-				"<All.address@server.com>",
-			},
-		},
-		{
-			" \"normal name\"  <username@server.com>, \"comma, name\" <address@server.com>",
-			[]string{
-				"\"normal name\" <username@server.com>",
-				"\"comma, name\" <address@server.com>",
-			},
-		},
-		{
-			" \"comma, one\"  <username@server.com>, \"comma, two\" <address@server.com>",
-			[]string{
-				"\"comma, one\" <username@server.com>",
-				"\"comma, two\" <address@server.com>",
-			},
-		},
-		{
-			" \"comma, name\"  <username@server.com>, another, name <address@server.com>",
-			[]string{
-				"\"comma, name\" <username@server.com>",
-				"\"another, name\" <address@server.com>",
-			},
-		},
-	}
-
-	for _, data := range tests {
-		result, err := parseAddressList(data.address)
-		assert.NoError(t, err)
-		assert.Len(t, result, len(data.expected))
-		for i, result := range result {
-			assert.Equal(t, data.expected[i], result.String())
-		}
-	}
-}
--- a/pkg/mime/encoding.go
+++ b/pkg/mime/encoding.go
@ -32,8 +32,7 @@ import (
 	"golang.org/x/text/encoding/htmlindex"
 )

-var wordDec = &mime.WordDecoder{
-	CharsetReader: func(charset string, input io.Reader) (io.Reader, error) {
+func CharsetReader(charset string, input io.Reader) (io.Reader, error) {
 	dec, err := SelectDecoder(charset)
 	if err != nil {
 		return nil, err
@ -42,7 +41,10 @@ var wordDec = &mime.WordDecoder{
 		return input, nil
 	}
 	return dec.Reader(input), nil
-	},
+}
+
+var WordDec = &mime.WordDecoder{
+	CharsetReader: CharsetReader,
 }

 // Expects trimmed lowercase.
@ -180,7 +182,7 @@ func SelectDecoder(charset string) (decoder *encoding.Decoder, err error) {

 // DecodeHeader if needed. Returns error if raw contains non-utf8 characters.
 func DecodeHeader(raw string) (decoded string, err error) {
-	if decoded, err = wordDec.DecodeHeader(raw); err != nil {
+	if decoded, err = WordDec.DecodeHeader(raw); err != nil {
 		decoded = raw
 	}
 	if !utf8.ValidString(decoded) {
--- a/pkg/pmapi/check_connection.go
+++ b/pkg/pmapi/check_connection.go
@ -0,0 +1,94 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+	"time"
+)
+
+const protonStatusURL = "http://protonstatus.com/vpn_status"
+
+// ErrNoInternetConnection indicates that both protonstatus and the API are unreachable.
+var ErrNoInternetConnection = errors.New("no internet connection")
+
+// CheckConnection returns an error if there is no internet connection.
+// This should be moved to the ConnectionManager when it is implemented.
+func (cm *ClientManager) CheckConnection() error {
+	// We use a normal dialer here which doesn't check tls fingerprints.
+	client := &http.Client{Timeout: time.Second * 10}
+
+	// Do not cumulate timeouts, use goroutines.
+	retStatus := make(chan error)
+	retAPI := make(chan error)
+
+	// vpn_status endpoint is fast and returns only OK. We check the connection only.
+	go checkConnection(client, protonStatusURL, retStatus)
+
+	// Check of API reachability also uses a fast endpoint.
+	go checkConnection(client, cm.GetRootURL()+"/tests/ping", retAPI)
+
+	errStatus := <-retStatus
+	errAPI := <-retAPI
+
+	switch {
+	case errStatus == nil && errAPI == nil:
+		return nil
+
+	case errStatus == nil && errAPI != nil:
+		cm.log.Error("ProtonStatus is reachable but API is not")
+		return ErrAPINotReachable
+
+	case errStatus != nil && errAPI == nil:
+		cm.log.Warn("API is reachable but protonstatus is not")
+		return nil
+
+	case errStatus != nil && errAPI != nil:
+		cm.log.Error("Both ProtonStatus and API are unreachable")
+		return ErrNoInternetConnection
+	}
+
+	return nil
+}
+
+// CheckConnection returns an error if there is no internet connection.
+func CheckConnection() error {
+	client := &http.Client{Timeout: time.Second * 10}
+	retStatus := make(chan error)
+	go checkConnection(client, protonStatusURL, retStatus)
+	return <-retStatus
+}
+
+func checkConnection(client *http.Client, url string, errorChannel chan error) {
+	resp, err := client.Get(url)
+	if err != nil {
+		errorChannel <- err
+		return
+	}
+
+	_ = resp.Body.Close()
+
+	if resp.StatusCode != 200 {
+		errorChannel <- fmt.Errorf("HTTP status code %d", resp.StatusCode)
+		return
+	}
+
+	errorChannel <- nil
+}
--- a/pkg/pmapi/client.go
+++ b/pkg/pmapi/client.go
@ -254,7 +254,7 @@ func (c *client) doBuffered(req *http.Request, bodyBuffer []byte, retryUnauthori
 			head += "\n"
 		}
 		c.log.Tracef("REQHEAD \n%s", head)
-		c.log.Tracef("REQBODY '%s'", string(bodyBuffer))
+		c.log.Tracef("REQBODY '%s'", printBytes(bodyBuffer))
 	}

 	hasBody := len(bodyBuffer) > 0
--- a/pkg/pmapi/clientmanager.go
+++ b/pkg/pmapi/clientmanager.go
@ -305,72 +305,6 @@ func (cm *ClientManager) GetAuthUpdateChannel() chan ClientAuth {
 	return cm.authUpdates
 }

-// ErrNoInternetConnection indicates that both protonstatus and the API are unreachable.
-var ErrNoInternetConnection = errors.New("no internet connection")
-
-// CheckConnection returns an error if there is no internet connection.
-// This should be moved to the ConnectionManager when it is implemented.
-func (cm *ClientManager) CheckConnection() error {
-	client := getHTTPClient(cm.config, cm.roundTripper, cm.cookieJar)
-
-	// Do not cumulate timeouts, use goroutines.
-	retStatus := make(chan error)
-	retAPI := make(chan error)
-
-	// vpn_status endpoint is fast and returns only OK. We check the connection only.
-	go checkConnection(client, "https://protonstatus.com/vpn_status", retStatus)
-
-	// Check of API reachability also uses a fast endpoint.
-	go checkConnection(client, cm.GetRootURL()+"/tests/ping", retAPI)
-
-	errStatus := <-retStatus
-	errAPI := <-retAPI
-
-	switch {
-	case errStatus == nil && errAPI == nil:
-		return nil
-
-	case errStatus == nil && errAPI != nil:
-		cm.log.Error("ProtonStatus is reachable but API is not")
-		return ErrAPINotReachable
-
-	case errStatus != nil && errAPI == nil:
-		cm.log.Warn("API is reachable but protonstatus is not")
-		return nil
-
-	case errStatus != nil && errAPI != nil:
-		cm.log.Error("Both ProtonStatus and API are unreachable")
-		return ErrNoInternetConnection
-	}
-
-	return nil
-}
-
-// CheckConnection returns an error if there is no internet connection.
-func CheckConnection() error {
-	client := &http.Client{Timeout: time.Second * 10}
-	retStatus := make(chan error)
-	go checkConnection(client, "https://protonstatus.com/vpn_status", retStatus)
-	return <-retStatus
-}
-
-func checkConnection(client *http.Client, url string, errorChannel chan error) {
-	resp, err := client.Get(url)
-	if err != nil {
-		errorChannel <- err
-		return
-	}
-
-	_ = resp.Body.Close()
-
-	if resp.StatusCode != 200 {
-		errorChannel <- fmt.Errorf("HTTP status code %d", resp.StatusCode)
-		return
-	}
-
-	errorChannel <- nil
-}
-
 // setTokenIfUnset sets the token for the given userID if it wasn't already set.
 // The set token does not expire.
 func (cm *ClientManager) setTokenIfUnset(userID, token string) {
--- a/pkg/pmapi/config_qa.go
+++ b/pkg/pmapi/config_qa.go
@ -15,7 +15,7 @@
 // You should have received a copy of the GNU General Public License
 // along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.

-// +build pmapi_env
+// +build pmapi_qa

 package pmapi

--- a/pkg/pmapi/debug.go
+++ b/pkg/pmapi/debug.go
@ -0,0 +1,43 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+import "unicode/utf8"
+
+func printBytes(body []byte) string {
+	if utf8.Valid(body) {
+		return string(body)
+	}
+	enc := []rune{}
+	for _, b := range body {
+		switch {
+		case b == 9:
+			enc = append(enc, rune('⟼'))
+		case b == 13:
+			enc = append(enc, rune('↵'))
+		case b < 32, b == 127:
+			enc = append(enc, '◡')
+		case b > 31 && b < 127, b == 10:
+			enc = append(enc, rune(b))
+		default:
+			enc = append(enc, 9728+rune(b))
+		}
+	}
+
+	return string(enc)
+}
--- a/pkg/pmapi/keyring.go
+++ b/pkg/pmapi/keyring.go
@ -19,6 +19,7 @@ package pmapi

 import (
 	"bytes"
+	"encoding/base64"
 	"encoding/json"
 	"io"
 	"io/ioutil"
@ -289,3 +290,57 @@ func signAttachment(encrypter *crypto.KeyRing, data io.Reader) (signature io.Rea
 	}
 	return bytes.NewReader(sig.GetBinary()), nil
 }
+
+func encryptAndEncodeSessionKeys(
+	pubkey *crypto.KeyRing,
+	bodyKey *crypto.SessionKey,
+	attkeys map[string]*crypto.SessionKey,
+) (bodyPacket string, attachmentPackets map[string]string, err error) {
+	// Encrypt message body keys.
+	packetBytes, err := pubkey.EncryptSessionKey(bodyKey)
+	if err != nil {
+		return
+	}
+	bodyPacket = base64.StdEncoding.EncodeToString(packetBytes)
+
+	// Encrypt attachment keys.
+	attachmentPackets = make(map[string]string)
+	for id, attkey := range attkeys {
+		var packets []byte
+		if packets, err = pubkey.EncryptSessionKey(attkey); err != nil {
+			return
+		}
+		attachmentPackets[id] = base64.StdEncoding.EncodeToString(packets)
+	}
+	return
+}
+
+func encryptSymmDecryptKey(
+	kr *crypto.KeyRing,
+	textToEncrypt string,
+) (decryptedKey *crypto.SessionKey, symEncryptedData []byte, err error) {
+	// We use only primary key to encrypt the message. Our keyring contains all keys (primary, old and deacivated ones).
+	firstKey, err := kr.FirstKey()
+	if err != nil {
+		return
+	}
+
+	pgpMessage, err := firstKey.Encrypt(crypto.NewPlainMessageFromString(textToEncrypt), kr)
+	if err != nil {
+		return
+	}
+
+	pgpSplitMessage, err := pgpMessage.SeparateKeyAndData(len(textToEncrypt), 0)
+	if err != nil {
+		return
+	}
+
+	decryptedKey, err = kr.DecryptSessionKey(pgpSplitMessage.GetBinaryKeyPacket())
+	if err != nil {
+		return
+	}
+
+	symEncryptedData = pgpSplitMessage.GetBinaryDataPacket()
+
+	return
+}
--- a/pkg/pmapi/message_send.go
+++ b/pkg/pmapi/message_send.go
@ -0,0 +1,367 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+import (
+	"encoding/base64"
+	"errors"
+
+	"github.com/ProtonMail/gopenpgp/v2/crypto"
+)
+
+// Draft actions
+const (
+	DraftActionReply    = 0
+	DraftActionReplyAll = 1
+	DraftActionForward  = 2
+)
+
+// PackageFlag for send message package types
+type PackageFlag int
+
+func (p *PackageFlag) Has(flag PackageFlag) bool { return iHasFlag(int(*p), int(flag)) }
+func (p *PackageFlag) HasAtLeastOne(flag PackageFlag) bool {
+	return iHasAtLeastOneFlag(int(*p), int(flag))
+}
+func (p *PackageFlag) Is(flag PackageFlag) bool    { return iIsFlag(int(*p), int(flag)) }
+func (p *PackageFlag) HasNo(flag PackageFlag) bool { return iHasNoneOfFlag(int(*p), int(flag)) }
+
+// Send message package types.
+const (
+	InternalPackage         = PackageFlag(1)
+	EncryptedOutsidePackage = PackageFlag(2)
+	ClearPackage            = PackageFlag(4)
+	PGPInlinePackage        = PackageFlag(8)
+	PGPMIMEPackage          = PackageFlag(16)
+	ClearMIMEPackage        = PackageFlag(32)
+)
+
+// SignatureFlag for send signature types.
+type SignatureFlag int
+
+func (p *SignatureFlag) Is(flag SignatureFlag) bool    { return iIsFlag(int(*p), int(flag)) }
+func (p *SignatureFlag) Has(flag SignatureFlag) bool   { return iHasFlag(int(*p), int(flag)) }
+func (p *SignatureFlag) HasNo(flag SignatureFlag) bool { return iHasNoneOfFlag(int(*p), int(flag)) }
+
+// Send signature types.
+const (
+	SignatureNone            = SignatureFlag(0)
+	SignatureDetached        = SignatureFlag(1)
+	SignatureAttachedArmored = SignatureFlag(2)
+)
+
+// DraftReq defines paylod for creating drafts
+type DraftReq struct {
+	Message              *Message
+	ParentID             string `json:",omitempty"`
+	Action               int
+	AttachmentKeyPackets []string
+}
+
+func (c *client) CreateDraft(m *Message, parent string, action int) (created *Message, err error) {
+	createReq := &DraftReq{Message: m, ParentID: parent, Action: action, AttachmentKeyPackets: []string{}}
+
+	req, err := c.NewJSONRequest("POST", "/mail/v4/messages", createReq)
+	if err != nil {
+		return
+	}
+
+	var res MessageRes
+	if err = c.DoJSON(req, &res); err != nil {
+		return
+	}
+
+	created, err = res.Message, res.Err()
+	return
+}
+
+type AlgoKey struct {
+	Key       string
+	Algorithm string
+}
+
+type MessageAddress struct {
+	Type                          PackageFlag
+	EncryptedBodyKeyPacket        string `json:"BodyKeyPacket"` // base64-encoded key packet.
+	Signature                     SignatureFlag
+	EncryptedAttachmentKeyPackets map[string]string `json:"AttachmentKeyPackets"`
+}
+
+type MessagePackage struct {
+	Addresses               map[string]*MessageAddress
+	Type                    PackageFlag
+	MIMEType                string
+	EncryptedBody           string             `json:"Body"`           // base64-encoded encrypted data packet.
+	DecryptedBodyKey        AlgoKey            `json:"BodyKey"`        // base64-encoded session key (only if cleartext recipients).
+	DecryptedAttachmentKeys map[string]AlgoKey `json:"AttachmentKeys"` // Only include if cleartext & attachments.
+}
+
+func newMessagePackage(
+	send sendData,
+	attKeys map[string]AlgoKey,
+) (pkg *MessagePackage) {
+	pkg = &MessagePackage{
+		EncryptedBody: base64.StdEncoding.EncodeToString(send.ciphertext),
+		Addresses:     send.addressMap,
+		MIMEType:      send.contentType,
+		Type:          send.sharedScheme,
+	}
+
+	if send.sharedScheme.HasAtLeastOne(ClearPackage | ClearMIMEPackage) {
+		pkg.DecryptedBodyKey.Key = send.decryptedBodyKey.GetBase64Key()
+		pkg.DecryptedBodyKey.Algorithm = send.decryptedBodyKey.Algo
+	}
+
+	if len(attKeys) != 0 && send.sharedScheme.Has(ClearPackage) {
+		pkg.DecryptedAttachmentKeys = attKeys
+	}
+
+	return pkg
+}
+
+type sendData struct {
+	decryptedBodyKey *crypto.SessionKey //body session key
+	addressMap       map[string]*MessageAddress
+	sharedScheme     PackageFlag
+	ciphertext       []byte
+	cleartext        string
+	contentType      string
+}
+
+type SendMessageReq struct {
+	ExpirationTime int64 `json:",omitempty"`
+	// AutoSaveContacts int `json:",omitempty"`
+
+	// Data for encrypted recipients.
+	Packages []*MessagePackage
+
+	mime, plain, rich sendData
+	attKeys           map[string]*crypto.SessionKey
+	kr                *crypto.KeyRing
+}
+
+func NewSendMessageReq(
+	kr *crypto.KeyRing,
+	mimeBody, plainBody, richBody string,
+	attKeys map[string]*crypto.SessionKey,
+) *SendMessageReq {
+	req := &SendMessageReq{}
+
+	req.mime.addressMap = make(map[string]*MessageAddress)
+	req.plain.addressMap = make(map[string]*MessageAddress)
+	req.rich.addressMap = make(map[string]*MessageAddress)
+
+	req.mime.cleartext = mimeBody
+	req.plain.cleartext = plainBody
+	req.rich.cleartext = richBody
+
+	req.attKeys = attKeys
+	req.kr = kr
+
+	return req
+}
+
+var (
+	errUnknownContentType           = errors.New("unknown content type")
+	errMultipartInNonMIME           = errors.New("multipart mixed not allowed in this scheme")
+	errAttSignNotSupported          = errors.New("attached signature not supported")
+	errEncryptMustSign              = errors.New("encrypted package must be signed")
+	errEncryptedOutsideNotSupported = errors.New("encrypted outside is not supported")
+	errWrongSendScheme              = errors.New("wrong send scheme")
+	errInternalMustEncrypt          = errors.New("internal package must be encrypted")
+	errInlineMustBePlain            = errors.New("PGP Inline package must be plain text")
+	errMissingPubkey                = errors.New("cannot encrypt body key packet: missing pubkey")
+	errClearSignMustNotBeHTML       = errors.New("clear signed packet must be multipart or plain")
+	errMIMEMustBeMultipart          = errors.New("MIME packet must be multipart")
+	errClearMIMEMustSign            = errors.New("clear MIME must be signed")
+	errClearSignMustNotBePGPInline  = errors.New("clear sign must not be PGP inline")
+)
+
+func (req *SendMessageReq) AddRecipient(
+	email string, sendScheme PackageFlag,
+	pubkey *crypto.KeyRing, signature SignatureFlag,
+	contentType string, doEncrypt bool,
+) (err error) {
+	if signature.Has(SignatureAttachedArmored) {
+		return errAttSignNotSupported
+	}
+
+	if doEncrypt && signature.HasNo(SignatureDetached) {
+		return errEncryptMustSign
+	}
+
+	switch sendScheme {
+	case PGPMIMEPackage, ClearMIMEPackage:
+		if contentType != ContentTypeMultipartMixed {
+			return errMIMEMustBeMultipart
+		}
+		return req.addMIMERecipient(email, sendScheme, pubkey, signature)
+	case InternalPackage, ClearPackage, PGPInlinePackage:
+		if contentType == ContentTypeMultipartMixed {
+			return errMultipartInNonMIME
+		}
+		return req.addNonMIMERecipient(email, sendScheme, pubkey, signature, contentType, doEncrypt)
+	case EncryptedOutsidePackage:
+		return errEncryptedOutsideNotSupported
+	default:
+		return errWrongSendScheme
+	}
+}
+
+func (req *SendMessageReq) addNonMIMERecipient(
+	email string, sendScheme PackageFlag,
+	pubkey *crypto.KeyRing, signature SignatureFlag,
+	contentType string, doEncrypt bool,
+) (err error) {
+	if signature.Is(SignatureDetached) && !doEncrypt {
+		if sendScheme.Is(PGPInlinePackage) {
+			return errClearSignMustNotBePGPInline
+		}
+		if sendScheme.Is(ClearPackage) && contentType == ContentTypeHTML {
+			return errClearSignMustNotBeHTML
+		}
+	}
+
+	var send *sendData
+
+	switch contentType {
+	case ContentTypePlainText:
+		send = &req.plain
+		send.contentType = ContentTypePlainText
+	case ContentTypeHTML, "":
+		send = &req.rich
+		send.contentType = ContentTypeHTML
+	case ContentTypeMultipartMixed:
+		return errMultipartInNonMIME
+	default:
+		return errUnknownContentType
+	}
+
+	if send.decryptedBodyKey == nil {
+		if send.decryptedBodyKey, send.ciphertext, err = encryptSymmDecryptKey(req.kr, send.cleartext); err != nil {
+			return err
+		}
+	}
+	newAddress := &MessageAddress{Type: sendScheme, Signature: signature}
+
+	if sendScheme.Is(PGPInlinePackage) && contentType == ContentTypeHTML {
+		return errInlineMustBePlain
+	}
+	if sendScheme.Is(InternalPackage) && !doEncrypt {
+		return errInternalMustEncrypt
+	}
+	if doEncrypt && pubkey == nil {
+		return errMissingPubkey
+	}
+
+	if doEncrypt {
+		newAddress.EncryptedBodyKeyPacket, newAddress.EncryptedAttachmentKeyPackets, err = encryptAndEncodeSessionKeys(pubkey, send.decryptedBodyKey, req.attKeys)
+		if err != nil {
+			return err
+		}
+	}
+	send.addressMap[email] = newAddress
+	send.sharedScheme |= sendScheme
+
+	return nil
+}
+
+func (req *SendMessageReq) addMIMERecipient(
+	email string, sendScheme PackageFlag,
+	pubkey *crypto.KeyRing, signature SignatureFlag,
+) (err error) {
+	if sendScheme.Is(ClearMIMEPackage) && signature.HasNo(SignatureDetached) {
+		return errClearMIMEMustSign
+	}
+
+	req.mime.contentType = ContentTypeMultipartMixed
+	if req.mime.decryptedBodyKey == nil {
+		if req.mime.decryptedBodyKey, req.mime.ciphertext, err = encryptSymmDecryptKey(req.kr, req.mime.cleartext); err != nil {
+			return err
+		}
+	}
+
+	if sendScheme.Is(PGPMIMEPackage) {
+		if pubkey == nil {
+			return errMissingPubkey
+		}
+		// Attachment keys are not needed because attachments are part
+		// of MIME body and therefore attachments are encrypted with
+		// body session key.
+		mimeBodyPacket, _, err := encryptAndEncodeSessionKeys(pubkey, req.mime.decryptedBodyKey, map[string]*crypto.SessionKey{})
+		if err != nil {
+			return err
+		}
+		req.mime.addressMap[email] = &MessageAddress{Type: sendScheme, EncryptedBodyKeyPacket: mimeBodyPacket, Signature: signature}
+	} else {
+		req.mime.addressMap[email] = &MessageAddress{Type: sendScheme, Signature: signature}
+	}
+	req.mime.sharedScheme |= sendScheme
+
+	return nil
+}
+
+func (req *SendMessageReq) PreparePackages() {
+	attkeysEncoded := make(map[string]AlgoKey)
+	for attID, attkey := range req.attKeys {
+		attkeysEncoded[attID] = AlgoKey{
+			Key:       attkey.GetBase64Key(),
+			Algorithm: attkey.Algo,
+		}
+	}
+
+	for _, send := range []sendData{req.mime, req.plain, req.rich} {
+		if len(send.addressMap) == 0 {
+			continue
+		}
+		req.Packages = append(req.Packages, newMessagePackage(send, attkeysEncoded))
+	}
+}
+
+type SendMessageRes struct {
+	Res
+
+	Sent *Message
+
+	// Parent is only present if the sent message has a parent (reply/reply all/forward).
+	Parent *Message
+}
+
+func (c *client) SendMessage(id string, sendReq *SendMessageReq) (sent, parent *Message, err error) {
+	if id == "" {
+		err = errors.New("pmapi: cannot send message with an empty id")
+		return
+	}
+
+	if sendReq.Packages == nil {
+		sendReq.Packages = []*MessagePackage{}
+	}
+
+	req, err := c.NewJSONRequest("POST", "/mail/v4/messages/"+id, sendReq)
+	if err != nil {
+		return
+	}
+
+	var res SendMessageRes
+	if err = c.DoJSON(req, &res); err != nil {
+		return
+	}
+
+	sent, parent, err = res.Sent, res.Parent, res.Err()
+	return
+}
--- a/pkg/pmapi/message_send_test.go
+++ b/pkg/pmapi/message_send_test.go
@ -0,0 +1,617 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+import (
+	"encoding/base64"
+	"testing"
+
+	"github.com/ProtonMail/gopenpgp/v2/crypto"
+	"github.com/stretchr/testify/require"
+)
+
+type recipient struct {
+	email       string
+	sendScheme  PackageFlag
+	pubkey      *crypto.KeyRing
+	signature   SignatureFlag
+	contentType string
+	doEncrypt   bool
+	wantError   error
+}
+
+type testData struct {
+	emails       []string
+	recipients   []recipient
+	wantPackages []*MessagePackage
+
+	allRecipients map[string]recipient
+	allAddresses  map[string]*MessageAddress
+
+	attKeys                       map[string]*crypto.SessionKey
+	mimeBody, plainBody, richBody string
+}
+
+func (td *testData) addRecipients(t testing.TB) {
+	for _, email := range td.emails {
+		rcp, ok := td.allRecipients[email]
+		require.True(t, ok, "missing recipient %s", email)
+		rcp.email = email
+		td.recipients = append(td.recipients, rcp)
+	}
+}
+
+func (td *testData) addAddresses(t testing.TB) {
+	for i, wantPackage := range td.wantPackages {
+		for email := range wantPackage.Addresses {
+			address, ok := td.allAddresses[email]
+			require.True(t, ok, "missing address %s", email)
+			td.wantPackages[i].Addresses[email] = address
+		}
+	}
+}
+
+func (td *testData) prepareAndCheck(t *testing.T) {
+	r := require.New(t)
+
+	matchPresence := func(want string) require.ValueAssertionFunc {
+		if len(want) == 0 {
+			return require.Empty
+		}
+		return require.NotEmpty
+	}
+
+	have := NewSendMessageReq(testPrivateKeyRing, td.mimeBody, td.plainBody, td.richBody, td.attKeys)
+	for _, rec := range td.recipients {
+		err := have.AddRecipient(rec.email, rec.sendScheme, rec.pubkey, rec.signature, rec.contentType, rec.doEncrypt)
+
+		if rec.wantError == nil {
+			r.NoError(err, "email %s", rec.email)
+		} else {
+			r.EqualError(err, rec.wantError.Error(), "email %s", rec.email)
+		}
+	}
+	have.PreparePackages()
+
+	r.Equal(len(td.wantPackages), len(have.Packages))
+
+	for i, wantPackage := range td.wantPackages {
+		havePackage := have.Packages[i]
+
+		r.Equal(wantPackage.MIMEType, havePackage.MIMEType, "pkg %d", i)
+		r.Equal(wantPackage.Type, havePackage.Type, "pkg %d", i)
+
+		r.Equal(len(wantPackage.Addresses), len(havePackage.Addresses), "pkg %d", i)
+		for email, wantAddress := range wantPackage.Addresses {
+			haveAddress, ok := havePackage.Addresses[email]
+			r.True(ok, "pkg %d email %s", i, email)
+
+			r.Equal(wantAddress.Type, haveAddress.Type, "pkg %d email %s", i, email)
+			matchPresence(wantAddress.EncryptedBodyKeyPacket)(t, haveAddress.EncryptedBodyKeyPacket, "pkg %d email %s", i, email)
+			r.Equal(wantAddress.Signature, haveAddress.Signature, "pkg %d email %s", i, email)
+
+			if len(td.attKeys) == 0 {
+				r.Len(haveAddress.EncryptedAttachmentKeyPackets, 0)
+			} else {
+				r.Equal(
+					len(wantAddress.EncryptedAttachmentKeyPackets),
+					len(haveAddress.EncryptedAttachmentKeyPackets),
+					"pkg %d email %s", i, email,
+				)
+				for attID, wantAttKey := range wantAddress.EncryptedAttachmentKeyPackets {
+					haveAttKey, ok := haveAddress.EncryptedAttachmentKeyPackets[attID]
+					r.True(ok, "pkg %d email %s att %s", i, email, attID)
+					matchPresence(wantAttKey)(t, haveAttKey, "pkg %d email %s att %s", i, email, attID)
+				}
+			}
+		}
+
+		matchPresence(wantPackage.EncryptedBody)(t, havePackage.EncryptedBody, "pkg %d", i)
+
+		wantBodyKey := wantPackage.DecryptedBodyKey
+		haveBodyKey := havePackage.DecryptedBodyKey
+
+		matchPresence(wantBodyKey.Algorithm)(t, haveBodyKey.Algorithm, "pkg %d", i)
+		matchPresence(wantBodyKey.Key)(t, haveBodyKey.Key, "pkg %d", i)
+
+		if len(td.attKeys) == 0 {
+			r.Len(havePackage.DecryptedAttachmentKeys, 0)
+		} else {
+			r.Equal(
+				len(wantPackage.DecryptedAttachmentKeys),
+				len(havePackage.DecryptedAttachmentKeys),
+				"pkg %d", i,
+			)
+			for attID, wantAttKey := range wantPackage.DecryptedAttachmentKeys {
+				haveAttKey, ok := havePackage.DecryptedAttachmentKeys[attID]
+				r.True(ok, "pkg %d att %s", i, attID)
+				matchPresence(wantAttKey.Key)(t, haveAttKey.Key, "pkg %d att %s", i, attID)
+				matchPresence(wantAttKey.Algorithm)(t, haveAttKey.Algorithm, "pkg %d att %s", i, attID)
+			}
+		}
+	}
+}
+
+func TestSendReq(t *testing.T) {
+	attKeyB64 := "EvjO/2RIJNn6HdoU6ACqFdZglzJhpjQ/PpjsvL3mB5Q="
+	token, err := base64.StdEncoding.DecodeString(attKeyB64)
+	require.NoError(t, err)
+
+	attKey := crypto.NewSessionKeyFromToken(token, "aes256")
+	attKeyPackets := map[string]string{"attID": "not-empty"}
+	attAlgoKeys := map[string]AlgoKey{"attID": {"not-empty", "not-empty"}}
+
+	allRecipients := map[string]recipient{
+		// Internal OK
+		"none@pm.me":  {"", InternalPackage, testPublicKeyRing, SignatureDetached, "", true, nil},
+		"html@pm.me":  {"", InternalPackage, testPublicKeyRing, SignatureDetached, ContentTypeHTML, true, nil},
+		"plain@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureDetached, ContentTypePlainText, true, nil},
+		// Internal bad
+		"wrongtype@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureDetached, "application/rfc822", true, errUnknownContentType},
+		"multipart@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureDetached, ContentTypeMultipartMixed, true, errMultipartInNonMIME},
+		"noencrypt@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureDetached, ContentTypeHTML, false, errInternalMustEncrypt},
+		"no-pubkey@pm.me": {"", InternalPackage, nil, SignatureDetached, ContentTypeHTML, true, errMissingPubkey},
+		"nosigning@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureNone, ContentTypeHTML, true, errEncryptMustSign},
+		// testing combination
+		"internal1@pm.me": {"", InternalPackage, testPublicKeyRing, SignatureDetached, ContentTypePlainText, true, nil},
+		// Clear OK
+		"html@email.com":       {"", ClearPackage, nil, SignatureNone, ContentTypeHTML, false, nil},
+		"none@email.com":       {"", ClearPackage, nil, SignatureNone, "", false, nil},
+		"plain@email.com":      {"", ClearPackage, nil, SignatureNone, ContentTypePlainText, false, nil},
+		"plain-sign@email.com": {"", ClearPackage, nil, SignatureDetached, ContentTypePlainText, false, nil},
+		"mime-sign@email.com":  {"", ClearMIMEPackage, nil, SignatureDetached, ContentTypeMultipartMixed, false, nil},
+		// Clear bad
+		"mime@email.com":             {"", ClearMIMEPackage, nil, SignatureNone, ContentTypeMultipartMixed, false, errClearMIMEMustSign},
+		"clear-plain-sign@email.com": {"", PGPInlinePackage, nil, SignatureDetached, ContentTypePlainText, false, errClearSignMustNotBePGPInline},
+		"html-sign@email.com":        {"", ClearPackage, nil, SignatureDetached, ContentTypeHTML, false, errClearSignMustNotBeHTML},
+		"mime-plain@email.com":       {"", ClearMIMEPackage, nil, SignatureDetached, ContentTypePlainText, false, errMIMEMustBeMultipart},
+		"mime-html@email.com":        {"", ClearMIMEPackage, nil, SignatureDetached, ContentTypeHTML, false, errMIMEMustBeMultipart},
+		// External Encryption OK
+		"mime@gpg.com":  {"", PGPMIMEPackage, testPublicKeyRing, SignatureDetached, ContentTypeMultipartMixed, true, nil},
+		"plain@gpg.com": {"", PGPInlinePackage, testPublicKeyRing, SignatureDetached, ContentTypePlainText, true, nil},
+		// External Encryption bad
+		"eo@gpg.com":           {"", EncryptedOutsidePackage, testPublicKeyRing, SignatureDetached, ContentTypeHTML, true, errEncryptedOutsideNotSupported},
+		"inline-html@gpg.com":  {"", PGPInlinePackage, testPublicKeyRing, SignatureDetached, ContentTypeHTML, true, errInlineMustBePlain},
+		"inline-mixed@gpg.com": {"", PGPInlinePackage, testPublicKeyRing, SignatureDetached, ContentTypeMultipartMixed, true, errMultipartInNonMIME},
+		"mime-plain@gpg.com":   {"", PGPMIMEPackage, nil, SignatureDetached, ContentTypePlainText, true, errMIMEMustBeMultipart},
+		"mime-html@sgpg.com":   {"", PGPMIMEPackage, nil, SignatureDetached, ContentTypeHTML, true, errMIMEMustBeMultipart},
+		"no-pubkey@gpg.com":    {"", PGPMIMEPackage, nil, SignatureDetached, ContentTypeMultipartMixed, true, errMissingPubkey},
+		"not-signed@gpg.com":   {"", PGPMIMEPackage, testPublicKeyRing, SignatureNone, ContentTypeMultipartMixed, true, errEncryptMustSign},
+	}
+
+	allAddresses := map[string]*MessageAddress{
+		"none@pm.me": {
+			Type:                          InternalPackage,
+			Signature:                     SignatureDetached,
+			EncryptedBodyKeyPacket:        "not-empty",
+			EncryptedAttachmentKeyPackets: attKeyPackets,
+		},
+		"plain@pm.me": {
+			Type:                          InternalPackage,
+			Signature:                     SignatureDetached,
+			EncryptedBodyKeyPacket:        "not-empty",
+			EncryptedAttachmentKeyPackets: attKeyPackets,
+		},
+		"html@pm.me": {
+			Type:                          InternalPackage,
+			Signature:                     SignatureDetached,
+			EncryptedBodyKeyPacket:        "not-empty",
+			EncryptedAttachmentKeyPackets: attKeyPackets,
+		},
+		"internal1@pm.me": {
+			Type:                          InternalPackage,
+			Signature:                     SignatureDetached,
+			EncryptedBodyKeyPacket:        "not-empty",
+			EncryptedAttachmentKeyPackets: attKeyPackets,
+		},
+
+		"html@email.com": {
+			Type:      ClearPackage,
+			Signature: SignatureNone,
+		},
+		"none@email.com": {
+			Type:      ClearPackage,
+			Signature: SignatureNone,
+		},
+		"plain@email.com": {
+			Type:      ClearPackage,
+			Signature: SignatureNone,
+		},
+		"plain-sign@email.com": {
+			Type:      ClearPackage,
+			Signature: SignatureDetached,
+		},
+		"mime-sign@email.com": {
+			Type:      ClearMIMEPackage,
+			Signature: SignatureDetached,
+		},
+
+		"mime@gpg.com": {
+			Type:                   PGPMIMEPackage,
+			Signature:              SignatureDetached,
+			EncryptedBodyKeyPacket: "non-empty",
+		},
+		"plain@gpg.com": {
+			Type:                          PGPInlinePackage,
+			Signature:                     SignatureDetached,
+			EncryptedBodyKeyPacket:        "non-empty",
+			EncryptedAttachmentKeyPackets: attKeyPackets,
+		},
+	}
+
+	// NOTE naming
+	// Single: there should be one package
+	// Multiple: there should be more than one package
+	// Internal: there should be internal package
+	// Clear: there should be non-encrypted package
+	// Encrypted: there should be encrypted package
+	// NotAllowed: combination of inputs which are not allowed
+	newTests := map[string]testData{
+		"Nothing": { // expect no crash
+			emails:       []string{},
+			wantPackages: []*MessagePackage{},
+		},
+		"Fails": {
+			emails: []string{
+				"wrongtype@pm.me",
+				"multipart@pm.me",
+				"noencrypt@pm.me",
+				"no-pubkey@pm.me",
+				"nosigning@pm.me",
+
+				"html-sign@email.com",
+				"mime-plain@email.com",
+				"mime-html@email.com",
+				"mime@email.com",
+				"clear-plain-sign@email.com",
+
+				"eo@gpg.com",
+				"inline-html@gpg.com",
+				"inline-mixed@gpg.com",
+				"mime-plain@gpg.com",
+				"mime-html@sgpg.com",
+				"no-pubkey@gpg.com",
+				"not-signed@gpg.com",
+			},
+		},
+
+		// one scheme in one package
+		"SingleInternalHTML": {
+			emails: []string{"none@pm.me", "html@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"none@pm.me": nil,
+						"html@pm.me": nil,
+					},
+					Type:          InternalPackage,
+					MIMEType:      ContentTypeHTML,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+		"SingleInternalPlain": {
+			emails: []string{"plain@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@pm.me": nil,
+					},
+					Type:          InternalPackage,
+					MIMEType:      ContentTypePlainText,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+
+		"SingleClearHTML": {
+			emails: []string{"none@email.com", "html@email.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"html@email.com": nil,
+						"none@email.com": nil,
+					},
+					Type:                    ClearPackage,
+					MIMEType:                ContentTypeHTML,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+		"SingleClearPlain": {
+			emails: []string{"plain@email.com", "plain-sign@email.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@email.com":      nil,
+						"plain-sign@email.com": nil,
+					},
+					Type:                    ClearPackage,
+					MIMEType:                ContentTypePlainText,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+		"SingleClearMIME": {
+			emails: []string{"mime-sign@email.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime-sign@email.com": nil,
+					},
+					Type:             ClearMIMEPackage,
+					MIMEType:         ContentTypeMultipartMixed,
+					EncryptedBody:    "non-empty",
+					DecryptedBodyKey: AlgoKey{"non-empty", "non-empty"},
+				},
+			},
+		},
+
+		"SingleEncyptedPlain": {
+			emails: []string{"plain@gpg.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@gpg.com": nil,
+					},
+					Type:          PGPInlinePackage,
+					MIMEType:      ContentTypePlainText,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+		"SingleEncyptedMIME": {
+			emails: []string{"mime@gpg.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime@gpg.com": nil,
+					},
+					Type:          PGPMIMEPackage,
+					MIMEType:      ContentTypeMultipartMixed,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+
+		// two schemes combined to one package
+		"SingleClearInternalPlain": {
+			emails: []string{"plain@email.com", "plain-sign@email.com", "plain@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@pm.me":          nil,
+						"plain@email.com":      nil,
+						"plain-sign@email.com": nil,
+					},
+					Type:                    InternalPackage | ClearPackage,
+					MIMEType:                ContentTypePlainText,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+		"SingleClearInternalHTML": {
+			emails: []string{"none@email.com", "html@email.com", "html@pm.me", "none@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"none@pm.me":     nil,
+						"html@pm.me":     nil,
+						"html@email.com": nil,
+						"none@email.com": nil,
+					},
+					Type:                    InternalPackage | ClearPackage,
+					MIMEType:                ContentTypeHTML,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+		"SingleEncryptedInternalPlain": {
+			emails: []string{"plain@gpg.com", "plain@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@pm.me":   nil,
+						"plain@gpg.com": nil,
+					},
+					Type:          InternalPackage | PGPInlinePackage,
+					MIMEType:      ContentTypePlainText,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+		"SingleEncryptedClearMIME": {
+			emails: []string{"mime@gpg.com", "mime-sign@email.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime@gpg.com":        nil,
+						"mime-sign@email.com": nil,
+					},
+					Type:             ClearMIMEPackage | PGPMIMEPackage,
+					MIMEType:         ContentTypeMultipartMixed,
+					EncryptedBody:    "non-empty",
+					DecryptedBodyKey: AlgoKey{"non-empty", "non-empty"},
+				},
+			},
+		},
+
+		// one scheme separated to multiple packages
+		"MultipleInternal": {
+			emails: []string{"none@pm.me", "html@pm.me", "plain@pm.me"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@pm.me": nil,
+					},
+					Type:          InternalPackage,
+					MIMEType:      ContentTypePlainText,
+					EncryptedBody: "non-empty",
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"none@pm.me": nil,
+						"html@pm.me": nil,
+					},
+					Type:          InternalPackage,
+					MIMEType:      ContentTypeHTML,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+		"MultipleClear": {
+			emails: []string{
+				"none@email.com", "html@email.com",
+				"plain@email.com", "plain-sign@email.com",
+				"mime-sign@email.com",
+			},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime-sign@email.com": nil,
+					},
+					Type:             ClearMIMEPackage,
+					MIMEType:         ContentTypeMultipartMixed,
+					EncryptedBody:    "non-empty",
+					DecryptedBodyKey: AlgoKey{"non-empty", "non-empty"},
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@email.com":      nil,
+						"plain-sign@email.com": nil,
+					},
+					Type:                    ClearPackage,
+					MIMEType:                ContentTypePlainText,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"html@email.com": nil,
+						"none@email.com": nil,
+					},
+					Type:                    ClearPackage,
+					MIMEType:                ContentTypeHTML,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+		"MultipleEncrypted": {
+			emails: []string{"plain@gpg.com", "mime@gpg.com"},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime@gpg.com": nil,
+					},
+					Type:          PGPMIMEPackage,
+					MIMEType:      ContentTypeMultipartMixed,
+					EncryptedBody: "non-empty",
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@gpg.com": nil,
+					},
+					Type:          PGPInlinePackage,
+					MIMEType:      ContentTypePlainText,
+					EncryptedBody: "non-empty",
+				},
+			},
+		},
+
+		"MultipleComboAll": {
+			emails: []string{
+				"none@pm.me",
+				"plain@pm.me",
+				"html@pm.me",
+
+				"none@email.com",
+				"html@email.com",
+				"plain@email.com",
+				"plain-sign@email.com",
+				"mime-sign@email.com",
+
+				"mime@gpg.com",
+				"plain@gpg.com",
+			},
+			wantPackages: []*MessagePackage{
+				{
+					Addresses: map[string]*MessageAddress{
+						"mime@gpg.com":        nil,
+						"mime-sign@email.com": nil,
+					},
+					Type:             ClearMIMEPackage | PGPMIMEPackage,
+					MIMEType:         ContentTypeMultipartMixed,
+					EncryptedBody:    "non-empty",
+					DecryptedBodyKey: AlgoKey{"non-empty", "non-empty"},
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"plain@gpg.com":        nil,
+						"plain@email.com":      nil,
+						"plain-sign@email.com": nil,
+						"plain@pm.me":          nil,
+					},
+					Type:                    InternalPackage | ClearPackage | PGPInlinePackage,
+					MIMEType:                ContentTypePlainText,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+				{
+					Addresses: map[string]*MessageAddress{
+						"none@pm.me":     nil,
+						"html@pm.me":     nil,
+						"none@email.com": nil,
+						"html@email.com": nil,
+					},
+					Type:                    InternalPackage | ClearPackage,
+					MIMEType:                ContentTypeHTML,
+					EncryptedBody:           "non-empty",
+					DecryptedBodyKey:        AlgoKey{"non-empty", "non-empty"},
+					DecryptedAttachmentKeys: attAlgoKeys,
+				},
+			},
+		},
+	}
+
+	for name, test := range newTests {
+		test.mimeBody = "Mime body"
+		test.plainBody = "Plain body"
+		test.richBody = "HTML body"
+		test.allRecipients = allRecipients
+		test.allAddresses = allAddresses
+
+		test.addRecipients(t)
+		test.addAddresses(t)
+
+		t.Run("NoAtt"+name, test.prepareAndCheck)
+		test.attKeys = map[string]*crypto.SessionKey{"attID": attKey}
+		t.Run("Att"+name, test.prepareAndCheck)
+	}
+}
--- a/pkg/pmapi/messages.go
+++ b/pkg/pmapi/messages.go
@ -569,114 +569,6 @@ func (c *client) GetMessage(id string) (msg *Message, err error) {
 	return res.Message, res.Err()
 }

-type SendMessageReq struct {
-	ExpirationTime int64 `json:",omitempty"`
-	// AutoSaveContacts int `json:",omitempty"`
-
-	// Data for encrypted recipients.
-	Packages []*MessagePackage
-}
-
-// Message package types.
-const (
-	InternalPackage         = 1
-	EncryptedOutsidePackage = 2
-	ClearPackage            = 4
-	PGPInlinePackage        = 8
-	PGPMIMEPackage          = 16
-	ClearMIMEPackage        = 32
-)
-
-// Signature types.
-const (
-	NoSignature  = 0
-	YesSignature = 1
-)
-
-type MessagePackage struct {
-	Addresses      map[string]*MessageAddress
-	Type           int
-	MIMEType       string
-	Body           string             // base64-encoded encrypted data packet.
-	BodyKey        AlgoKey            // base64-encoded session key (only if cleartext recipients).
-	AttachmentKeys map[string]AlgoKey // Only include if cleartext & attachments.
-}
-
-type MessageAddress struct {
-	Type                 int
-	BodyKeyPacket        string // base64-encoded key packet.
-	Signature            int    // 0 = None, 1 = Detached, 2 = Attached/Armored
-	AttachmentKeyPackets map[string]string
-}
-
-type AlgoKey struct {
-	Key       string
-	Algorithm string
-}
-
-type SendMessageRes struct {
-	Res
-
-	Sent *Message
-
-	// Parent is only present if the sent message has a parent (reply/reply all/forward).
-	Parent *Message
-}
-
-func (c *client) SendMessage(id string, sendReq *SendMessageReq) (sent, parent *Message, err error) {
-	if id == "" {
-		err = errors.New("pmapi: cannot send message with an empty id")
-		return
-	}
-
-	if sendReq.Packages == nil {
-		sendReq.Packages = []*MessagePackage{}
-	}
-
-	req, err := c.NewJSONRequest("POST", "/mail/v4/messages/"+id, sendReq)
-	if err != nil {
-		return
-	}
-
-	var res SendMessageRes
-	if err = c.DoJSON(req, &res); err != nil {
-		return
-	}
-
-	sent, parent, err = res.Sent, res.Parent, res.Err()
-	return
-}
-
-const (
-	DraftActionReply    = 0
-	DraftActionReplyAll = 1
-	DraftActionForward  = 2
-)
-
-type DraftReq struct {
-	Message              *Message
-	ParentID             string `json:",omitempty"`
-	Action               int
-	AttachmentKeyPackets []string
-}
-
-func (c *client) CreateDraft(m *Message, parent string, action int) (created *Message, err error) {
-	createReq := &DraftReq{Message: m, ParentID: parent, Action: action, AttachmentKeyPackets: []string{}}
-
-	req, err := c.NewJSONRequest("POST", "/mail/v4/messages", createReq)
-	if err != nil {
-		return
-	}
-
-	var res MessageRes
-	if err = c.DoJSON(req, &res); err != nil {
-		return
-	}
-
-	created, err = res.Message, res.Err()
-	return
-}
-
 type MessagesActionReq struct {
 	IDs []string
 }
--- a/pkg/pmapi/mocks/mocks.go
+++ b/pkg/pmapi/mocks/mocks.go
@ -5,12 +5,11 @@
 package mocks

 import (
-	io "io"
-	reflect "reflect"
-
 	crypto "github.com/ProtonMail/gopenpgp/v2/crypto"
 	pmapi "github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	gomock "github.com/golang/mock/gomock"
+	io "io"
+	reflect "reflect"
 )

 // MockClient is a mock of Client interface
--- a/pkg/pmapi/proxy_test.go
+++ b/pkg/pmapi/proxy_test.go
@ -382,7 +382,7 @@ func TestProxyProvider_UseProxy_RevertIfProxyStopsWorkingAndOriginalAPIIsReachab
 	// The error should be ErrAPINotReachable because the connection dropped intermittently but
 	// the original API is now reachable (see Alternative-Routing-v2 spec for details).
 	url, err = cm.switchToReachableServer()
-	require.EqualError(t, err, ErrAPINotReachable.Error())
+	require.Error(t, err)
 	require.Equal(t, rootURL, url)
 	require.Equal(t, rootURL, cm.getHost())
 }
--- a/pkg/pmapi/settings.go
+++ b/pkg/pmapi/settings.go
@ -85,7 +85,7 @@ type MailSettings struct {
 	RightToLeft        int
 	AttachPublicKey    int
 	Sign               int
-	PGPScheme          int
+	PGPScheme          PackageFlag
 	PromptPin          int
 	Autocrypt          int
 	NumMessagePerPage  int
--- a/pkg/pmapi/tlsreport.go
+++ b/pkg/pmapi/tlsreport.go
@ -35,13 +35,21 @@ var ErrTLSMismatch = errors.New("no TLS fingerprint match found")
 // TrustedAPIPins contains trusted public keys of the protonmail API and proxies.
 // NOTE: the proxy pins are the same for all proxy servers, guaranteed by infra team ;)
 var TrustedAPIPins = []string{ // nolint[gochecknoglobals]
+	// api.protonmail.ch
 	`pin-sha256="drtmcR2kFkM8qJClsuWgUzxgBkePfRCkRpqUesyDmeE="`, // current
-	`pin-sha256="YRGlaY0jyJ4Jw2/4M8FIftwbDIQfh8Sdro96CeEel54="`, // hot
-	`pin-sha256="AfMENBVvOS8MnISprtvyPsjKlPooqh8nMB/pvCrpJpw="`, // cold
-	`pin-sha256="EU6TS9MO0L/GsDHvVc9D5fChYLNy5JdGYpJw0ccgetM="`, // proxy main
-	`pin-sha256="iKPIHPnDNqdkvOnTClQ8zQAIKG0XavaPkcEo0LBAABA="`, // proxy backup 1
-	`pin-sha256="MSlVrBCdL0hKyczvgYVSRNm88RicyY04Q2y5qrBt0xA="`, // proxy backup 2
-	`pin-sha256="C2UxW0T1Ckl9s+8cXfjXxlEqwAfPM4HiW2y3UdtBeCw="`, // proxy backup 3
+	`pin-sha256="YRGlaY0jyJ4Jw2/4M8FIftwbDIQfh8Sdro96CeEel54="`, // hot backup
+	`pin-sha256="AfMENBVvOS8MnISprtvyPsjKlPooqh8nMB/pvCrpJpw="`, // cold backup
+
+	// protonmail.com
+	`pin-sha256="8joiNBdqaYiQpKskgtkJsqRxF7zN0C0aqfi8DacknnI="`, // current
+	`pin-sha256="JMI8yrbc6jB1FYGyyWRLFTmDNgIszrNEMGlgy972e7w="`, // hot backup
+	`pin-sha256="Iu44zU84EOCZ9vx/vz67/MRVrxF1IO4i4NIa8ETwiIY="`, // cold backup
+
+	// proxies
+	`pin-sha256="EU6TS9MO0L/GsDHvVc9D5fChYLNy5JdGYpJw0ccgetM="`, // main
+	`pin-sha256="iKPIHPnDNqdkvOnTClQ8zQAIKG0XavaPkcEo0LBAABA="`, // backup 1
+	`pin-sha256="MSlVrBCdL0hKyczvgYVSRNm88RicyY04Q2y5qrBt0xA="`, // backup 2
+	`pin-sha256="C2UxW0T1Ckl9s+8cXfjXxlEqwAfPM4HiW2y3UdtBeCw="`, // backup 3
 }

 // TLSReportURI is the address where TLS reports should be sent.
--- a/pkg/pmapi/users.go
+++ b/pkg/pmapi/users.go
@ -18,7 +18,7 @@
 package pmapi

 import (
-	"github.com/getsentry/raven-go"
+	"github.com/getsentry/sentry-go"
 	"github.com/pkg/errors"
 )

@ -119,7 +119,11 @@ func (c *client) UpdateUser() (user *User, err error) {
 	}

 	c.user = user
-	raven.SetUserContext(&raven.User{ID: user.ID})
+	sentry.ConfigureScope(func(scope *sentry.Scope) {
+		scope.SetUser(sentry.User{
+			ID: user.ID,
+		})
+	})

 	var tmpList AddressList
 	if tmpList, err = c.GetAddresses(); err == nil {
--- a/pkg/pmapi/utils.go
+++ b/pkg/pmapi/utils.go
@ -0,0 +1,23 @@
+// Copyright (c) 2020 Proton Technologies AG
+//
+// This file is part of ProtonMail Bridge.
+//
+// ProtonMail Bridge is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// ProtonMail Bridge is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
+
+package pmapi
+
+func iHasFlag(i, flag int) bool           { return i&flag == flag }
+func iHasAtLeastOneFlag(i, flag int) bool { return i&flag > 0 }
+func iIsFlag(i, flag int) bool            { return i == flag }
+func iHasNoneOfFlag(i, flag int) bool     { return !iHasAtLeastOneFlag(i, flag) }
--- a/pkg/sentry/report.go
+++ b/pkg/sentry/report.go
@ -18,135 +18,15 @@
 package sentry

 import (
-	"fmt"
-	"regexp"
+	"errors"
 	"runtime"
-	"runtime/pprof"
-	"strconv"
-	"strings"
+	"time"

-	"github.com/getsentry/raven-go"
+	"github.com/getsentry/sentry-go"
 	log "github.com/sirupsen/logrus"
 )

-const fileParseError = "[file parse error]"
-
-var isGoroutine = regexp.MustCompile("^goroutine [[:digit:]]+.*") //nolint[gochecknoglobals]
-
-// Threads implements standard sentry thread report.
-type Threads struct {
-	Values []Thread `json:"values"`
-}
-
-// Class specifier.
-func (s *Threads) Class() string { return "threads" }
-
-// Thread wraps a single stacktrace.
-type Thread struct {
-	ID         int               `json:"id"`
-	Name       string            `json:"name"`
-	Crashed    bool              `json:"crashed"`
-	Stacktrace *raven.Stacktrace `json:"stacktrace"`
-}
-
-// TraceAllRoutines traces all goroutines and saves them to the current object.
-func (s *Threads) TraceAllRoutines() {
-	s.Values = []Thread{}
-	goroutines := &strings.Builder{}
-	_ = pprof.Lookup("goroutine").WriteTo(goroutines, 2)
-
-	thread := Thread{ID: -1}
-	var frame *raven.StacktraceFrame
-	for _, v := range strings.Split(goroutines.String(), "\n") {
-		// Ignore empty lines.
-		if v == "" {
-			continue
-		}
-
-		// New routine.
-		if isGoroutine.MatchString(v) {
-			if thread.ID >= 0 {
-				s.Values = append(s.Values, thread)
-			}
-			thread = Thread{ID: thread.ID + 1, Name: v, Crashed: thread.ID == -1, Stacktrace: &raven.Stacktrace{Frames: []*raven.StacktraceFrame{}}}
-			continue
-		}
-
-		// New function.
-		if frame == nil {
-			frame = &raven.StacktraceFrame{Function: v}
-			continue
-		}
-
-		// Set filename and add frame.
-		if frame.Filename == "" {
-			fld := strings.Fields(v)
-			if len(fld) != 2 {
-				frame.Filename = fileParseError
-				frame.AbsolutePath = v
-			} else {
-				frame.Filename = fld[0]
-				sp := strings.Split(fld[0], ":")
-				if len(sp) > 1 {
-					i, err := strconv.Atoi(sp[len(sp)-1])
-					if err == nil {
-						frame.Filename = strings.Join(sp[:len(sp)-1], ":")
-						frame.Lineno = i
-					}
-				}
-			}
-			if frame.AbsolutePath == "" && frame.Filename != fileParseError {
-				frame.AbsolutePath = frame.Filename
-				if sp := strings.Split(frame.Filename, "/"); len(sp) > 1 {
-					frame.Filename = sp[len(sp)-1]
-				}
-			}
-			thread.Stacktrace.Frames = append([]*raven.StacktraceFrame{frame}, thread.Stacktrace.Frames...)
-			frame = nil
-			continue
-		}
-	}
-	// Add last thread.
-	s.Values = append(s.Values, thread)
-}
-
-func findPanicSender(s *Threads, err error) string {
-	out := "error nil"
-	if err != nil {
-		out = err.Error()
-	}
-	for _, thread := range s.Values {
-		if !thread.Crashed {
-			continue
-		}
-		for i, fr := range thread.Stacktrace.Frames {
-			if strings.HasSuffix(fr.Filename, "panic.go") && strings.HasPrefix(fr.Function, "panic") {
-				// Next frame if any.
-				j := 0
-				if i > j {
-					j = i - 1
-				}
-
-				// Directory and filename.
-				fname := thread.Stacktrace.Frames[j].AbsolutePath
-				if sp := strings.Split(fname, "/"); len(sp) > 2 {
-					fname = strings.Join(sp[len(sp)-2:], "/")
-				}
-
-				// Line number.
-				if ln := thread.Stacktrace.Frames[j].Lineno; ln > 0 {
-					fname = fmt.Sprintf("%s:%d", fname, ln)
-				}
-
-				out = fmt.Sprintf("%s: %s", fname, out)
-				break // Just first panic.
-			}
-		}
-	}
-	return out
-}
-
-// ReportSentryCrash reports a sentry crash with stacktrace from all goroutines.
+// ReportSentryCrash reports a sentry crash.
 func ReportSentryCrash(clientID, appVersion, userAgent string, reportErr error) (err error) {
 	if reportErr == nil {
 		return
@ -160,18 +40,16 @@ func ReportSentryCrash(clientID, appVersion, userAgent string, reportErr error)
 		"UserID":    "",
 	}

-	threads := &Threads{}
-	threads.TraceAllRoutines()
-	errorWithFile := findPanicSender(threads, reportErr)
-	packet := raven.NewPacket(errorWithFile, threads)
+	sentry.WithScope(func(scope *sentry.Scope) {
+		scope.SetTags(tags)
+		sentry.CaptureException(reportErr)
+	})

-	eventID, ch := raven.Capture(packet, tags)
-
-	if err = <-ch; err == nil {
-		log.WithField("errorID", eventID).Warn("Reported sentry error")
-	} else {
-		log.WithField("error", reportErr).WithError(err).Error("Failed to report sentry error")
+	if !sentry.Flush(time.Second * 10) {
+		log.WithField("error", reportErr).Error("failed to report sentry error")
+		return errors.New("failed to report sentry error")
 	}

-	return err
+	log.WithField("error", reportErr).Warn("reported sentry error")
+	return
 }
--- a/pkg/sentry/report_test.go
+++ b/pkg/sentry/report_test.go
@ -1,69 +0,0 @@
-// Copyright (c) 2020 Proton Technologies AG
-//
-// This file is part of ProtonMail Bridge.
-//
-// ProtonMail Bridge is free software: you can redistribute it and/or modify
-// it under the terms of the GNU General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// ProtonMail Bridge is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-// GNU General Public License for more details.
-//
-// You should have received a copy of the GNU General Public License
-// along with ProtonMail Bridge.  If not, see <https://www.gnu.org/licenses/>.
-
-package sentry
-
-import (
-	"errors"
-	"testing"
-
-	"github.com/getsentry/raven-go"
-)
-
-func TestSentryCrashReport(t *testing.T) {
-	if err := ReportSentryCrash(
-		"clientID",
-		"appVersion",
-		"useragent",
-		errors.New("Testing crash report - api proxy; goroutines with threads, find origin"),
-	); err != nil {
-		t.Fatal("Expected no error while report, but have", err)
-	}
-}
-
-func (s *Threads) TraceAllRoutinesTest() {
-	s.Values = []Thread{
-		{
-			ID:      0,
-			Name:    "goroutine 20 [running]",
-			Crashed: true,
-			Stacktrace: &raven.Stacktrace{
-				Frames: []*raven.StacktraceFrame{
-					{
-						Filename: "/home/dev/build/go-1.10.2/go/src/runtime/pprof/pprof.go",
-						Function: "runtime/pprof.writeGoroutineStacks(0x9b7de0, 0xc4203e2900, 0xd0, 0xd0)",
-						Lineno:   650,
-					},
-				},
-			},
-		},
-		{
-			ID:      1,
-			Name:    "goroutine 20 [chan receive]",
-			Crashed: false,
-			Stacktrace: &raven.Stacktrace{
-				Frames: []*raven.StacktraceFrame{
-					{
-						Filename: "/home/dev/build/go-1.10.2/go/src/testing/testing.go",
-						Function: "testing.(*T).Run(0xc4203e42d0, 0x90f445, 0x15, 0x97d358, 0x47a501)",
-						Lineno:   825,
-					},
-				},
-			},
-		},
-	}
-}
--- a/release-notes/bugs-bridge.txt
+++ b/release-notes/bugs-bridge.txt
@ -1,3 +1,4 @@
-• Fixed rare mail loss when moving from Spam folder
-• Limited log size
-• Fixed Linux font issues (mouse hover).
+• Bridge crashes related to labels handling
+• GUI popup related to TLS connection error
+• An issue where a random session key is included in the data payload
+• Error handling (including improved detection)
--- a/release-notes/bugs-importexport.txt
+++ b/release-notes/bugs-importexport.txt
@ -1,3 +0,0 @@
-• Linux font issues - Fedora specific
-• App response to the user pausing and canceling import or export
-• Handling errors during update
--- a/release-notes/notes-bridge.txt
+++ b/release-notes/notes-bridge.txt
@ -1,8 +1,4 @@
-• Bulletproofing against any potential data loss and/or duplication
-• Performance improvements for handling attachments and non-standard formatting
-• Better stability of the message parser
-• Additional foreign encoding support for outgoing messages
-• Complete refactor of the way messages are parsed to simplify code maintenance
-• Improved User-Agent detection
-• Added MacOS Big Sur compatibility
-• Added persistent anonymous API cookies
+• Improved package creation logic
+• Refactor of sending functions to simplify code maintenance
+• Added tests for package creation
+• For more detailed summary of the changes see https://github.com/ProtonMail/proton-bridge/blob/master/Changelog.md
--- a/release-notes/notes-importexport.txt
+++ b/release-notes/notes-importexport.txt
@ -1,5 +1,3 @@
-• Improvements to the import from large mbox files with multiple labels
-• Not allow to run multiple instances of the app or transfers at the same time
-• Various enhancements of the import process related to parsing
-• Cosmetic GUI changes
-• Better error handling
+• Further improvements to address and date parsing
+• Better handling and displaying of skipped messages
+• Improved error reporting
--- a/test/api_checks_test.go
+++ b/test/api_checks_test.go
@ -28,7 +28,7 @@ import (

 func APIChecksFeatureContext(s *godog.Suite) {
 	s.Step(`^API endpoint "([^"]*)" is called with:$`, apiIsCalledWith)
-	s.Step(`^message is sent with API call:$`, messageIsSentWithAPICall)
+	s.Step(`^message is sent with API call$`, messageIsSentWithAPICall)
 	s.Step(`^API mailbox "([^"]*)" for "([^"]*)" has messages$`, apiMailboxForUserHasMessages)
 	s.Step(`^API mailbox "([^"]*)" for address "([^"]*)" of "([^"]*)" has messages$`, apiMailboxForAddressOfUserHasMessages)
 }
--- a/test/features/bridge/imap/message/update_spam.feature
+++ b/test/features/bridge/imap/message/update_spam.feature
@ -4,14 +4,14 @@ Feature: IMAP update messages in Spam folder
    # Messages are inserted in opposite way to keep increasing ID.
    # Sequence numbers are then opposite than listed above.
    And there are messages in mailbox "Spam" for "user"
-      | from              | to         | subject | body  | read  | starred | deleted |
-      | john.doe@mail.com | user@pm.me | foo     | hello | false | false   | false   |
-      | jane.doe@mail.com | name@pm.me | bar     | world | true  | true    | false   |
+      | id | from              | to         | subject | body  | read  | starred | deleted |
+      | 1  | john.doe@mail.com | user@pm.me | foo     | hello | false | false   | false   |
+      | 2  | jane.doe@mail.com | name@pm.me | bar     | world | true  | true    | false   |
    And there is IMAP client logged in as "user"
    And there is IMAP client selected in "Spam"

  Scenario: Mark message as read only
-    When IMAP client marks message "2" with "\Seen"
+    When IMAP client marks message seq "1" with "\Seen"
    Then IMAP response is "OK"
    And message "1" in "Spam" for "user" is marked as read
    And message "1" in "Spam" for "user" is marked as unstarred
--- a/test/features/bridge/smtp/send/bcc.feature
+++ b/test/features/bridge/smtp/send/bcc.feature
@ -17,7 +17,7 @@ Feature: SMTP with bcc
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject |
      | [userAddress] | bridgetest@protonmail.com | hello   |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -52,7 +52,7 @@ Feature: SMTP with bcc
    And mailbox "Sent" for "user" has messages
      | from          | to | subject |
      | [userAddress] |    | hello   |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
--- a/test/features/bridge/smtp/send/html.feature
+++ b/test/features/bridge/smtp/send/html.feature
@ -21,7 +21,7 @@ Feature: SMTP sending of HTML messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject            |
      | [userAddress] | pm.bridge.qa@gmail.com | HTML text external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -96,7 +96,7 @@ Feature: SMTP sending of HTML messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject              |
      | [userAddress] | pm.bridge.qa@gmail.com | Html Inline External |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -185,7 +185,7 @@ Feature: SMTP sending of HTML messages
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject                          |
      | [userAddress] | bridgetest@protonmail.com | Html Inline Alternative Internal |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -274,7 +274,7 @@ Feature: SMTP sending of HTML messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                          |
      | [userAddress] | pm.bridge.qa@gmail.com | Html Inline Alternative External |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
--- a/test/features/bridge/smtp/send/html_att.feature
+++ b/test/features/bridge/smtp/send/html_att.feature
@ -41,7 +41,7 @@ Feature: SMTP sending of HTML messages with attachments
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject                       |
      | [userAddress] | bridgetest@protonmail.com | HTML with attachment internal |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -100,7 +100,7 @@ Feature: SMTP sending of HTML messages with attachments
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                           |
      | [userAddress] | pm.bridge.qa@gmail.com | HTML with attachment external PGP |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
--- a/test/features/bridge/smtp/send/plain.feature
+++ b/test/features/bridge/smtp/send/plain.feature
@ -16,7 +16,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject |
      | [userAddress] | bridgetest@protonmail.com |         |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -50,7 +50,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject |
      | [userAddress] | pm.bridge.qa@gmail.com |         |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -87,7 +87,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject             |
      | [userAddress] | bridgetest@protonmail.com | Plain text internal |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -124,7 +124,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject             |
      | [userAddress] | pm.bridge.qa@gmail.com | Plain text external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -161,7 +161,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                        |
      | [userAddress] | pm.bridge.qa@gmail.com | Plain text no charset external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -201,7 +201,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                        |
      | [userAddress] | pm.bridge.qa@gmail.com | Plain text no charset external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -236,7 +236,7 @@ Feature: SMTP sending of plain messages
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                                 |
      | [userAddress] | pm.bridge.qa@gmail.com | Plain, no charset, no content, external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
--- a/test/features/bridge/smtp/send/plain_att.feature
+++ b/test/features/bridge/smtp/send/plain_att.feature
@ -41,7 +41,7 @@ Feature: SMTP sending of plain messages with attachments
    And mailbox "Sent" for "user" has messages
      | from          | to                        | subject               |
      | [userAddress] | bridgetest@protonmail.com | Plain with attachment |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -100,7 +100,7 @@ Feature: SMTP sending of plain messages with attachments
    And mailbox "Sent" for "user" has messages
      | from          | to                     | subject                        |
      | [userAddress] | pm.bridge.qa@gmail.com | Plain with attachment external |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
@ -160,7 +160,7 @@ Feature: SMTP sending of plain messages with attachments
    And mailbox "Sent" for "user" has messages
      | from          | to                     | cc                 | subject                                            |
      | [userAddress] | pm.bridge.qa@gmail.com | bridgeqa@seznam.cz | Plain with attachment external PGP and external CC |
-    And message is sent with API call:
+    And message is sent with API call
      """
      {
        "Message": {
--- a/test/features/bridge/smtp/send/send_append.feature
+++ b/test/features/bridge/smtp/send/send_append.feature
@ -0,0 +1,50 @@
+Feature: SMTP sending with APPENDing to Sent
+  Background:
+    Given there is connected user "user"
+    And there is IMAP client logged in as "user"
+    And there is IMAP client selected in "Sent"
+    And there is SMTP client logged in as "user"
+
+  Scenario: Send message and append to Sent
+    # First do sending.
+    When SMTP client sends message
+      """
+      To: Internal Bridge <bridgetest@protonmail.com>
+      Subject: Manual send and append
+      Message-ID: bridgemessage42
+
+      hello
+
+      """
+    Then SMTP response is "OK"
+    And mailbox "Sent" for "user" has 1 messages
+    And mailbox "Sent" for "user" has messages
+      | externalid      | from          | to                        | subject                |
+      | bridgemessage42 | [userAddress] | bridgetest@protonmail.com | Manual send and append |
+    And message is sent with API call
+      """
+      {
+        "Message": {
+          "Subject": "Manual send and append",
+          "ExternalID": "bridgemessage42"
+        }
+      }
+      """
+
+    # Then simulate manual append to Sent mailbox - message should be detected as a duplicate.
+    When IMAP client imports message to "Sent"
+      """
+      To: Internal Bridge <bridgetest@protonmail.com>
+      Subject: Manual send and append
+      Message-ID: bridgemessage42
+
+      hello
+
+      """
+    Then IMAP response is "OK"
+    And mailbox "Sent" for "user" has 1 messages
+
+    # Check that the external ID was not lost in the process.
+    When IMAP client sends command "FETCH 1 body.peek[header]"
+    Then IMAP response is "OK"
+    And IMAP response contains "bridgemessage42"
--- a/test/mocks/imap_response.go
+++ b/test/mocks/imap_response.go
@ -155,7 +155,7 @@ func (ir *IMAPResponse) AssertSectionsInOrder(wantRegexps ...string) *IMAPRespon
 func (ir *IMAPResponse) AssertSections(wantRegexps ...string) *IMAPResponse {
 	ir.wait()
 	for _, wantRegexp := range wantRegexps {
-		a.NoError(ir.t, ir.hasSectionRegexp(wantRegexp), "regexp %v not found", wantRegexp)
+		a.NoError(ir.t, ir.hasSectionRegexp(wantRegexp), "regexp %v not found\nSections: %v", wantRegexp, ir.sections)
 	}
 	return ir
 }
--- a/test/mocks/smtp.go
+++ b/test/mocks/smtp.go
@ -23,12 +23,12 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"net/mail"
 	"os"
 	"strings"
 	"sync"
 	"time"

+	"github.com/ProtonMail/go-rfc5322"
 	"github.com/pkg/errors"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@ -148,12 +148,12 @@ func (c *SMTPClient) SendMail(r io.Reader, bcc string) *SMTPResponse {

 		from = c.address
 		if from == "" && strings.HasPrefix(line, "From: ") {
-			if addr, err := mail.ParseAddress(line[6:]); err == nil {
-				from = addr.Address
+			if addrs, err := rfc5322.ParseAddressList(line[6:]); err == nil {
+				from = addrs[0].Address
 			}
 		}
 		if strings.HasPrefix(line, "To: ") || strings.HasPrefix(line, "CC: ") {
-			if addrs, err := mail.ParseAddressList(line[4:]); err == nil {
+			if addrs, err := rfc5322.ParseAddressList(line[4:]); err == nil {
 				for _, addr := range addrs {
 					tos = append(tos, addr.Address)
 				}
--- a/test/store_checks_test.go
+++ b/test/store_checks_test.go
@ -19,10 +19,10 @@ package tests

 import (
 	"fmt"
-	"net/mail"
 	"strings"
 	"time"

+	"github.com/ProtonMail/go-rfc5322"
 	"github.com/ProtonMail/proton-bridge/internal/store"
 	"github.com/ProtonMail/proton-bridge/pkg/pmapi"
 	"github.com/ProtonMail/proton-bridge/test/accounts"
@ -211,6 +211,10 @@ func messagesContainsMessageRow(account *accounts.TestAccount, allMessages []int
 				if message.ID != id {
 					matches = false
 				}
+			case "externalid":
+				if message.ExternalID != cell.Value {
+					matches = false
+				}
 			case "from": //nolint[goconst]
 				address := ctx.EnsureAddress(account.Username(), cell.Value)
 				if !areAddressesSame(message.Sender.Address, address) {
@ -276,15 +280,15 @@ func messagesContainsMessageRow(account *accounts.TestAccount, allMessages []int
 }

 func areAddressesSame(first, second string) bool {
-	firstAddress, err := mail.ParseAddress(first)
+	firstAddress, err := rfc5322.ParseAddressList(first)
 	if err != nil {
 		return false
 	}
-	secondAddress, err := mail.ParseAddress(second)
+	secondAddress, err := rfc5322.ParseAddressList(second)
 	if err != nil {
 		return false
 	}
-	return firstAddress.Address == secondAddress.Address
+	return firstAddress[0].Address == secondAddress[0].Address
 }

 func messagesInMailboxForUserIsMarkedAsRead(bddMessageIDs, mailboxName, bddUserID string) error {
--- a/test/transfer_checks_test.go
+++ b/test/transfer_checks_test.go
@ -21,13 +21,13 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
-	"net/mail"
 	"os"
 	"path/filepath"
 	"sort"
 	"strings"
 	"time"

+	"github.com/ProtonMail/go-rfc5322"
 	"github.com/cucumber/godog"
 	"github.com/cucumber/godog/gherkin"
 	"github.com/emersion/go-mbox"
@ -65,15 +65,15 @@ func progressFinishedWith(wantResponse string) error {

 func transferExportedNumberOfMessages(wantCount int) error {
 	progress := ctx.GetTransferProgress()
-	_, _, exported, _, _ := progress.GetCounts() //nolint[dogsled]
-	a.Equal(ctx.GetTestingT(), uint(wantCount), exported)
+	counts := progress.GetCounts()
+	a.Equal(ctx.GetTestingT(), uint(wantCount), counts.Exported)
 	return ctx.GetTestingError()
 }

 func transferImportedNumberOfMessages(wantCount int) error {
 	progress := ctx.GetTransferProgress()
-	_, imported, _, _, _ := progress.GetCounts() //nolint[dogsled]
-	a.Equal(ctx.GetTestingT(), uint(wantCount), imported)
+	counts := progress.GetCounts()
+	a.Equal(ctx.GetTestingT(), uint(wantCount), counts.Imported)
 	return ctx.GetTestingError()
 }

@ -243,7 +243,7 @@ func parseTime(input string) (time.Time, error) {
 }

 func parseAddresses(input string) ([]string, error) {
-	addresses, err := mail.ParseAddressList(input)
+	addresses, err := rfc5322.ParseAddressList(input)
 	if err != nil {
 		return nil, err
 	}
@ -255,11 +255,11 @@ func parseAddresses(input string) ([]string, error) {
 }

 func parseAddress(input string) (string, error) {
-	address, err := mail.ParseAddress(input)
+	address, err := rfc5322.ParseAddressList(input)
 	if err != nil {
 		return "", err
 	}
-	return address.Address, nil
+	return address[0].Address, nil
 }

 // BySubject implements sort.Interface based on the subject field.
--- a/unreleased.md
+++ b/unreleased.md
@ -0,0 +1,11 @@
+# ProtonMail Bridge and Import-Export app Changelog
+
+Changelog [format](http://keepachangelog.com/en/1.0.0/)
+
+## Unreleased
+
+### Added
+
+### Changed
+
+### Removed
Author	SHA1	Message	Date
Jakub	072ce54fe1	Bridge 1.5.2 Golden Gate Release Notes * Improved package creation logic * Refactor of sending functions to simplify code maintenance * Added tests for package creation Fixed * Bridge crashes related to labels handling * GUI popup related to TLS connection error * An issue where a random session key is included in the data payload * Error handling (including improved detection)	2020-11-24 10:38:36 +01:00
Jakub	1f31df3a94	Bridge 1.5.1 Golden Gate Release Notes * Improved package creation logic * Refactor of sending functions to simplify code maintenance * Added tests for package creation Fixed * Bridge crashes related to labels handling * GUI popup related to TLS connection error * An issue where a random session key is included in the data payload * Error handling (including improved detection)	2020-11-23 07:43:43 +01:00
Pavel Škoda	9ee30e4923	Add sentry fingerprint	2020-11-20 14:44:42 +00:00
Pavel Škoda	7b44f12ab1	Update sentry client	2020-11-20 14:44:42 +00:00
Jakub	874882b554	Logic change to follow old code.	2020-11-20 13:39:13 +00:00
Jakub	945bdf4c60	Custom types for flags and encrypted outside test	2020-11-20 13:39:13 +00:00
Jakub	6e1e5a2afe	re-organise test definitions	2020-11-20 13:39:13 +00:00
Jakub	b709b51790	Simplify test cases	2020-11-20 13:39:13 +00:00
Jakub	d380485bb6	Fixing lint and integration tests, changelog, GODT-880, and typos	2020-11-20 13:39:13 +00:00
Jakub	87c8228cd0	rename	2020-11-20 13:39:13 +00:00
Jakub	152046bf97	refactor smtp sending * [x] move package creation logic to `pmapi.SendMessageReq` * [ ] write test of package creation logic * [x] internal * [x] plain * [x] external encrypted * [ ] signature ??? * [x] attachments	2020-11-20 13:39:13 +00:00
Jakub	a0fbed5859	use unreleased for changes	2020-11-20 14:35:24 +01:00
Grégoire Willmann	89e9e17d26	Fix typos in InlineLabelSelect.qml	2020-11-20 07:43:43 +00:00
James Houlahan	b595247392	chore: add version info to github issue template	2020-11-19 16:57:21 +01:00
Pavel Škoda	9d50a8cef2	Add OS to app version	2020-11-18 09:46:01 +00:00
Michal Horejsek	f888176485	Build creates proper binary names	2020-11-18 08:56:38 +00:00
Michal Horejsek	2f9876ad74	Remove unnecessary semicolon	2020-11-13 13:18:16 +00:00
Michal Horejsek	53404122cc	Integration test of sending and manual appending to Sent mailbox	2020-11-13 13:18:16 +00:00
Michal Horejsek	ba65494fce	Try load messages one-by-one	2020-11-13 09:43:04 +00:00
Jakub	70645c1732	Import-Export Elbe 1.2.1 • Further improvements to address and date parsing • Better handling and displaying of skipped messages • Improved error reporting	2020-11-11 14:03:00 +01:00
Jakub	1055e60d27	Fixing time order in changelog.	2020-11-11 12:02:56 +01:00
James Houlahan	e04196f8a0	feat: switch to public go-rfc5322 parser	2020-11-10 09:27:07 +00:00
Michal Horejsek	11a0dec047	Using atomic bool	2020-11-10 07:50:29 +00:00
Michal Horejsek	b9740e1b7d	Close connection before deleting labels to prevent panics accessing deleted bucket	2020-11-10 07:50:29 +00:00
Jakub	f0695eb870	add test gui	2020-11-09 11:58:32 +00:00
Michal Horejsek	a40018cdf9	Percentage available on progress count struct	2020-11-09 11:58:32 +00:00
Michal Horejsek	5b7eabe21a	Skipped messages do not change total counts but shows as separate number	2020-11-09 11:58:32 +00:00
James Houlahan	d5d60aa11b	feat: remove tls upgrade error notification	2020-11-09 10:59:42 +00:00
Jakub	a62fa132e6	rename build tag	2020-11-06 16:02:30 +01:00
James Houlahan	052395f917	test: add benchmarks for rfc5322 address/date parser	2020-11-04 15:00:18 +01:00
Jakub	9a77650004	Bridge GoldenGate 1.5.0 - Ensured better message flow by refactoring both address and date parsing - Improved secure connectivity checks - Better deb packaging - More robust error handling - Ensured that conversations are properly threaded - Fixed Linux font issues (Fedora) - Better handling of Mime encrypted messages	2020-11-04 12:26:07 +01:00
Michal Horejsek	f1d70361c9	Do not include conversation ID in references	2020-11-04 09:12:16 +00:00
James Houlahan	3496599723	feat: custom address/date parser based on rfc5322 abnf	2020-11-03 16:21:06 +01:00
James Houlahan	9e0635a6a4	fix: don't check tls fingerprints when checking connectivity	2020-11-02 13:38:39 +00:00
Michal Horejsek	10509621ce	Updated go-mbox dependency back to upstream	2020-11-02 10:32:21 +01:00
Michal Horejsek	3727ecdfe5	Show in error counts also lost messages at the end report	2020-10-30 13:58:32 +00:00
Michal Horejsek	ac71d22e86	Waiting for unilateral update during deleting the message	2020-10-30 13:42:04 +00:00
James Houlahan	bc81356d53	test: update feature file to use new "seq" command	2020-10-29 13:10:54 +01:00