In case the server responds with a 550 Thunderbird correctly shows an error message to the user and goes back to the edit window, so you can resend the message.
If it would do the same in the case of a 4XX all would be good. Should be an easy fix. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1215882 Title: Emails are silently discarded on 554 reply to STARTTLS To manage notifications about this bug go to: https://bugs.launchpad.net/thunderbird/+bug/1215882/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
