[Mimedefang] Anti-SPAM for mailman mailing lists question

[Kevin A. McGrail]

> Another approach that I'm less certain about (today isn't my "root thru
the
> sendmail source code day") would be to add an additional IP address to the
> existing mail server, MX the lists to it and run your existing
> sendmail+MIMEDefang configuration.  My logic is this: since the mailing
> lists are on a different hostname+IP address no MTA would ever connect to
> that address except to deliver to mailman recipients.  If I'm correct, you
> would have the effect of stream_by_domain() taken care of before messages
> ever got to MIMEDefang at all.  Again, if you see "crossover" where there
> are mailman and non-mailman recipients then either my idea is busted or
it's
> a bad guy.  The nifty thing about this approach is that you don't have to
> worry about running a two instances of MIMEDefang on a single box (which
> could get interesting!).

Chris,

This is brilliant and simple all at the same time.  I think it should
definitely work except perhaps for mail sent internally but that has low
spam probability anyway.