feat(GODT-2502): Additional info.

internal/app/app.go

@@ -248,6 +248,7 @@ func run(c *cli.Context) error {
 									"lastVersion": v.GetLastVersion().String(),
 									"showAllMail": v.GetShowAllMail(),
 									"updateCh":    v.GetUpdateChannel(),
+									"autoUpdate":  v.GetAutoUpdate(),
 									"rollout":     v.GetUpdateRollout(),
 									"DoH":         v.GetProxyAllowed(),
 								}).Info("Vault loaded")

internal/bridge/smtp_backend.go

@@ -23,6 +23,7 @@ import (
 
 	"github.com/ProtonMail/proton-bridge/v3/internal/safe"
 	"github.com/emersion/go-smtp"
+	"github.com/sirupsen/logrus"
 )
 
 type smtpBackend struct {
@@ -85,7 +86,7 @@ func (s *smtpSession) Rcpt(to string) error {
 }
 
 func (s *smtpSession) Data(r io.Reader) error {
-	return safe.RLockRet(func() error {
+	err := safe.RLockRet(func() error {
 		user, ok := s.users[s.userID]
 		if !ok {
 			return ErrNoSuchUser
@@ -93,4 +94,10 @@ func (s *smtpSession) Data(r io.Reader) error {
 
 		return user.SendMail(s.authID, s.from, s.to, r)
 	}, s.usersLock)
+
+	if err != nil {
+		logrus.WithField("pkg", "smtp").WithError(err).Error("Send mail failed.")
+	}
+
+	return err
 }

internal/user/user.go

@@ -119,6 +119,12 @@ func New(
 		return nil, fmt.Errorf("failed to get labels: %w", err)
 	}
 
+	logrus.WithFields(logrus.Fields{
+		"userID":    apiUser.ID,
+		"numAddr":   len(apiAddrs),
+		"numLabels": len(apiLabels),
+	}).Info("Creating user object")
+
 	// Create the user object.
 	user := &User{
 		log: logrus.WithField("userID", apiUser.ID),