[Mailman-Users] spam gatewayed from Usenet to mail bypasses our spam filters

[Stephen J. Turnbull]

skip at pobox.com writes:

 > I still haven't figured out quite how to solve the problem.  In
 > theory we could use some other tool to perform the gateway
 > operation.  Instead of passing Usenet postings directly to Mailman
 > it would mail them to python-list at python.org where they would get
 > the spam filter treatment before Mailman sees them.  I'm still
 > thinking about the full ramifications of that.

Well, you want to watch out for greylisting.  But running them through
SpamBayes from Mailman should be trivial.  You could also add (with a
slight performance hit) a Handler that calls out to SpamBayes,
SpamAssassin, etc, only when the MTA didn't already do that, or only
when the message's from_usenet flag is set.

 > It might be easier to get Mailman's news-to-mail gateway to mail
 > incoming Usenet messages to the list address instead of directly
 > distributing them to the subscribers though.

That's probably not a great idea as ToUsenet comes pretty late in the
pipeline.