Hello,
Today I encountered a very weird issue which I'm not sure how to summarize,
so I'll just go through the sequence of events. This morning a user
reported that one of their posts to a moderated list seemed to just
disappear, with no error message, no moderation mail, nothing appearing in
the moderation queue when they checked in the web UI. The problem was
reproduceible on multiple attempts. Looking at the logs for the relevant
times, I saw this in /var/log/mailman/smtp-failure:
May 19 09:55:58 2020 (15631) All recipients refused: {'vice': (550, '5.7.1
Command rejected')}, msgid: <mailman.XXXX>
May 19 09:55:58 2020 (15631) delivery to vice failed with code 550: 5.7.1
Command rejected
"vice" (with no @domain) is obviously not a valid email address, and it
wasn't clear where it was coming from, but a clue was that that word
appeared as the first word of the sender name (not the actual address),
i.e. in the format:
"Vice Something Or Other, etc" <addr...@domain.com>
After some trial and error, we eventually figured out that if we massaged
the sender name into a format that did not include the quote marks (which
it looks like Thunderbird inserts automatically if the name includes a
comma), then the mail would go through and hit the moderation queue
successfully.
This issue appears to affect only this one particular list - other lists
(managed by the same user, using the same email client) don't seem to have
the issue. I compared the sender filters and content filters between the
list and another list that doesn't have the issue, and didn't see any
relevant-seeming differences between them.
Any ideas what would be causing this?
Running mailman 2.1.9
Kevin Bowen
kevin.t.bo...@gmail.com <ke...@ucsd.edu>
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