We have a number of "source" lists, e.g. listA, listB and listC. Each
of them has listZ as a member, with the intention that all posts to A,
B and C get replicated to Z.
This all works until it gets to the point where posts to Z get emailed
out to the members of Z. This is currently failing because the gateway
mail system we are using is reporting "Duplicate header
'Delivered-To'".
Is there a setting or mechanism I can set in Mailman 2.1 that strips
the duplicate header or does anyone have any other suggestions on how
to resolve this?
Thanks.
Philip