[Mailman-Users] Some subscribers receiving multiple copies

Nigel Metheringham Nigel.Metheringham at vdata.co.uk
Thu Sep 30 10:46:35 CEST 1999

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 

I've just checked yesterdays logs and found one message that did this.  
In this case the final mail injection was duplicated - ie mailman 
injected the message 5 times to a different set of subscribers, and 
then injected it twice with the same recipient list each time.

There is no indication of problems in the mailman logs.

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.

[ Nigel Metheringham                  Nigel.Metheringham at VData.co.uk ]
[ Phone: +44 1423 850000                         Fax +44 1423 858866 ]

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