Other Improved tests in move_without_support

test/store_setup_test.go

@@ -101,6 +101,11 @@ func thereAreMessagesInMailboxesForAddressOfUser(mailboxNames, bddAddressID, bdd
 
 		if message.HasLabelID(pmapi.SentLabel) {
 			message.Flags |= pmapi.FlagSent
+		} else {
+			// some tests (Outlook move by DELETE EXPUNGE APPEND) imply creating hard copies of emails,
+			// and the importMessage() function flags the email as Sent if the 'Received' key in not present in the
+			// header.
+			header.Add("Received", "from dummy.protonmail.com")
 		}
 
 		bddMessageID := ""