[OT] Mail & Web forums

[Upayavira]

[Off topic alert - this is completely off topic, but I'm stuck for 
anywhere else to look - please excuse me!]

I'm looking for a system (preferably open source) that I can install on 
my own server, that'll allow me to set up a combined mailing list/web 
based forum, (much as we have now with ezmlm and gmane), i.e.messages 
can be sent by email or on a web page, messages can be received by email 
or viewed, threaded, on a web page. I can't use Gmane as these lists 
will be private.

Anyone able to give me pointers (replies off list are fine)? I've been 
looking for months and not found anything.

Sorry for the noise.

Regards, Upayavira