Frank Bures wrote on 04/02/2009 09:31:49 AM:

> Lately I have been banging my head against the following problem.  I
would
> very much appreciate any ideas, no matter how wild they might seem.
>
> What happens:  I have mostly local subscribers, but some are from
outside
> domains like gmail, hotmail and yahoo.  One of the outside domains is
our
> university central mail system (our department is running its own mail
> system).  Subscribers, whose addresses are in the university central
mail
> system intermittently receive list posts duplicated.  I traced the
problem
> in the logs and here is an example of what happens:

It would help if the user would send you the full headers to both messages
that were duplicates.  Look at where they are the same, and where the
difference occurs, mostly in the Received headers.