http://bugzilla.opensuse.org/show_bug.cgi?id=963282 Bug ID: 963282 Summary: Thunderbird reacts incorrectly to an smtp 451 response Classification: openSUSE Product: openSUSE Distribution Version: Leap 42.1 Hardware: Other OS: Other Status: NEW Severity: Normal Priority: P5 - None Component: Firefox Assignee: bnc-team-mozilla@forge.provo.novell.com Reporter: carlos.e.r@opensuse.org QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- This is an intermittent problem, I can not reproduce at will. But after discussing it in the mail list, we have pin pointed it. Sometimes, when sending an email, my ISP responds with a 451, temporary problem (possibly greylisting). Thunderbird acts as if the email was fully sent, storing it in the "Sent" box, just popping up a message box saying something like (I don't have a photo, but I might if needed) "the ISP replied there is a temporary local problem, try later". But there is no possibility of trying later, because the mail is not placed in the outbox, but in the sent folder. To send it again, I copy it to the drafo folder, edit it, hit send. Usually it fails again, several times, which leads me to believe it is a content filter. Now, when this happens in another machine where thunderbird hands over to postfix for the sending, I do see the response from the ISP causing this misbehaviour: <2.6> 2016-01-22 05:07:59 Telcontar postfix 30958 - - 185176066D: to=, relay=smtp.telefonica.net[86.109.99.70]:25, delay=0.46, delays=0.03/0.01/0.35/0.08, dsn=4.0.0, status=deferred (host smtp.telefonica.net[86.109.99.70] said: 451 Temporary local problem - please try later (in reply to end of DATA command)) Postfix behaves properly by queueing the post for later, as shown by the "mailq" command. Just wait 15 minutes, running the command "sendmail -q", and the mail is sent successfully. The BUG is that Thunderbird fails to send the email and does not automatically try again. It does not place the mail in the outpbox in order to try again later. It places it in the Sent box, signalling success. -- You are receiving this mail because: You are on the CC list for the bug.