Stephen J. Turnbull writes:
Diana von Bidder writes:
I have several entries in /var/lib/mailman3/queue/shunt/ with Aug 21 timestamps,
Evidence! Preserve it!
You can look at those using "mailman qfile <file>", where the specification for <file> needs to be a regular path. the 'qfile' command does not assume a prefix of /var/lib/mailman3/queue/, unfortunately.
You can also try the "mailman unshunt" command (which takes no further arguments). Then "mailman unshunt" just moves all the files in "shunt" back to the queues they came from for normal processing. Most likely the same error will happen and they end up in shunt again, but sometimes the problem was on Mailman's side and unshunting causes them to be sent as normal.
Of course, even if the messages get sent, that doesn't mean "everything's fixed", but at least it's a clue to help us figure out why the original messages got shunted (ie, probably not a major defect in the messages themselves).
Regards, Steve