On 5/20/20 9:01 AM, Kevin Bowen wrote:
> 
>> Actually, this seems backwards to me. ...
> 
> Yes, I know it seems counterintuitive, but that's the behavior I'm seeing -
> the issue is triggered by a sender name which includes any character which
> causes Thunderbird to automatically surround it in quotes - at least,
> that's how it displays it in the GUI, I can't see under the hood to know
> what it's actually including in the SMTP transaction. I would think it was
> a Thunderbird bug with not actually enclosing the name in quotes in the
> SMTP transaction, except that the user reports that it only affects this
> one list, despite using the same client for other lists.


You (or the user) can view the raw message in Tbird's Sent folder with
ctrl-U (or View -> Message Source or More -> View Source). Of course
this won't show what the user's outbound MTA does to it.


> Here are the inbound MTA logs from around the time of one of the failed
> attempts. For outbound we use a cloud hosted service, which I don't have
> the logs for - I could potentially get those logs, but I don't think they'd
> tell us anything we don't already know since we can see from the mailman
> logs that the outbound SMTP server is rejecting the mail due to it being
> addressed to the invalid address "vice".


The only ones of interest are the incoming post to the list which are
these (the others are all bounces):

> May 19 14:56:40 announce sendmail[20370]: STARTTLS=server, relay=
> mx0a-0016e101.pphosted.com [148.163.145.30], version=TLSv1/SSLv3,
> verify=OK, cipher=AES256-SHA, bits=256/256

> May 19 14:56:40 announce sendmail[20370]: 04JLucCj020370: from=<
> admin...@redacted.com>, size=8540, class=0, nrcpts=1, msgid=<
> 6bb38def-fdf0-3662-715f-572193d37...@redacted.com>, proto=ESMTP,
> daemon=MTA, relay=mx0a-0016e101.pphosted.com [148.163.145.30]

> May 19 14:57:01 announce sendmail[20447]: 04JLucCj020370:
> to="|/usr/lib/mailman/mail/mailman post all-official-l", ctladdr=<
> all-officia...@announce.redacted.com> (8/0), delay=00:00:21,
> xdelay=00:00:00, mailer=prog, pri=128540, dsn=2.0.0, stat=Sent


However, these show only the envelope sender <admin...@redacted.com> and
not the From:

I suspect that the issue you are seeing and the fact that it only
affects this one list are due to the fact that for some reason, Mailman
is doing something with the post and trying to notify the sender, and
all you see is the bounce of the notice.

For other list's the post is accepted and delivered and there is nothing
that requires notice to the sender.

My first thought that this was an auto-discard, but that doesn't notify
the user, so it is still a mystery as to what happens to the post itself
since you say nothing appears in the moderation queue? Have you checked
Mailman's error log?

-- 
Mark Sapiro <m...@msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan
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