Mailman mangles message ids in nntp gateway (patch attached)
Mailman rewrites nntp message ids when receiving messages from newsgroups, this results in broken threading since the messages loose the relation to each other.
I made a simple patch to make this behaviour configurable. When message id mangling is disabled, Mailman will add a new "X-Mailman-
The attached patch was made against Mailman v2.1.9 and works for use since 04/2009.
Any change to have this included in the official release?