I did get a bit further into the digging and it appears that emails a building 
up the outbound queue directory (/var/spool/mailman/out). I have already 
confirmed the out running is running (ps -fwwA |grep runner=out) and that lead 
me to this in the error log:

Oct 14 12:43:52 2026 (2313) Uncaught runner exception: [Errno 2] No such file 
or directory: '/var/spool/mailman/retry/1791980411.545217+fc2a0a88d8708e9$
Oct 14 12:43:52 2026 (2313) Traceback (most recent call last):
  File "/usr/lib/mailman/Mailman/Queue/Runner.py", line 120, in _oneloop
    self._onefile(msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/Runner.py", line 191, in _onefile
    keepqueued = self._dispose(mlist, msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/OutgoingRunner.py", line 130, in _dispose
    self.__retryq.enqueue(msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/Switchboard.py", line 136, in enqueue
    fp = open(tmpfile, 'w')
IOError: [Errno 2] No such file or directory: 
'/var/spool/mailman/retry/1791980411.545217+fc2a0a88d8708e9d96c194e8005b3a2950f4b278.pck.tmp'

Oct 14 12:43:52 2026 (2313) Uncaught runner exception: [Errno 2] No such file 
or directory: '/var/spool/mailman/shunt/1791980411.545217+f82f3518db742b2$
Oct 14 12:43:52 2026 (2313) Traceback (most recent call last):
  File "/usr/lib/mailman/Mailman/Queue/Runner.py", line 136, in _oneloop
    new_filebase = self._shunt.enqueue(msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/Switchboard.py", line 136, in enqueue
    fp = open(tmpfile, 'w')
IOError: [Errno 2] No such file or directory: 
'/var/spool/mailman/shunt/1791980411.545217+f82f3518db742b2c8c339a4152e3bf35985e93d7.pck.tmp'

Oct 14 12:43:52 2026 (2313) SHUNTING FAILED, preserving original entry: 
1791980411.545217+39b213b664fd0d19037b7050615d6fab71ea6840
Oct 14 12:43:52 2026 (2313) Failed to unlink/preserve backup file: 
/var/spool/mailman/out/1791980411.545217+39b213b664fd0d19037b7050615d6fab71ea6840.bak

I have read this could be a bad message, corrupted in some way so I guess 
looking for a pointer from here to where to go next.



Chris Puchalski

Prin Spclst, Cyber Defense

C: +1 214-733-7164
[email protected]<mailto:[email protected]>



RTX

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________________________________
From: Washington Odhiambo <[email protected]>
Sent: Wednesday, October 14, 2026 11:51 AM
To: [email protected] <[email protected]>
Cc: Puchalski, Chris (USA) <[email protected]>
Subject: Re: [Mailman-Users] Older Version of Mailman (2.1.12) Suddenly Very 
Slow in Delivery

On Wed, Oct 14, 2026 at 8: 40 PM Puchalski, Chris via Mailman-Users 
<mailman-users@ python. org> wrote: I have an older version of mailman that 
cannot be upgraded due to a number of reasons and recently it appears that 
messages sent to the



On Wed, Oct 14, 2026 at 8:40 PM Puchalski, Chris via Mailman-Users 
<[email protected]<mailto:[email protected]>> wrote:
I have an older version of mailman that cannot be upgraded due to a number of 
reasons and recently it appears that messages sent to the hosted lists seem to 
take a very large time once in the server. I can see the messages deliver to 
postfix and almost an hour later (maybe more) the messages leave the service to 
the list members.

I recently have restarted postfix/mailman and in fact the whole server. 
Sometimes that clears things up but today the problem has persisted. I also ran 
the check_perms with the -f switch where it caught and corrected an issue 
SMTPDirect.pyc about permissions needing to set to 0644. When that same check 
was run a second time nothing was caught.

Where else can I dig for a possible cause to my recent issues for what has been 
an incredibly system for years?

Dedicated troubleshooting should be easy enough. Employing the services of AI 
is need be is okay:)

--
Best regards,
Odhiambo WASHINGTON,
Nairobi,KE
+254 7 3200 0004/+254 7 2274 3223
 In an Internet failure case, the #1 suspect is a constant: DNS.
"Oh, the cruft.", egrep -v '^$|^.*#' ¯\_(ツ)_/¯ :-)
[How to ask smart questions: 
http://www.catb.org/~esr/faqs/smart-questions.html<https://urldefense.us/v2/url?u=http-3A__www.catb.org_-7Eesr_faqs_smart-2Dquestions.html&d=DwMFaQ&c=MASr1KIcYm9UGIT-jfIzwQg1YBeAkaJoBtxV_4o83uQ&r=YSHnKgNEhiYTYiWfpKvuabk61iV6qMNGur1_1CS1mMM&m=EiT6DTQFogAFrh9t31F5vBwy00p8X-1UcHYYqUIswN7fXmkeaBhc9Q_-AjHMjdb2&s=X_XcbzevzZio0AraialHFO-loPbDLeLyyg2ulaXHano&e=>]
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