[Mailman-Users] Some subscribers receiving multiple copies
Nigel.Metheringham at vdata.co.uk
Tue Oct 5 18:50:08 CEST 1999
I previously wrote:-
> will at connectcorp.net said:
> > Some of our subscribers are reporting receiving 2, 3, or even 4 copies
> > of each post.
> I've seen very occasional examples of this on our list running mailman
> 1.0. The headers show that the duplication is occurring at the point
> where mailman injects the message into the MTA for delivery to the list
> The injects were spread over a 5 or so minute period, with the last 2
> (duplicated) injects done 2.5 minutes apart. The machine would have
> been quite heavily loaded around that time - there was a message still
> in the process of injection by mailman when the second arrived and a
> few messages in the mailq.
It appears this happens at times of high load and/or when the DNS is
not very available. Suspicions are that mailman is retrying a
submission that it thinks is timing out.
In an attempt to work round this I have stopped exim doing receipient
address verification on the fly for incoming messages from mailman (the
config line is
receiver_verify_hosts = !127.0.0.1/8:0.0.0.0/0
This, so far (one day), appears to have fixed the problem. However its
early days yet.
[ Nigel Metheringham Nigel.Metheringham at VData.co.uk ]
[ Phone: +44 1423 850000 Fax +44 1423 858866 ]
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