O.T. anyone with an email server

[Dave]

Hello,
	This is off topic so please respond privately. I'm looking for
anyone running a postfix email server. I'm wondering what antispam measures
your using, i'm trying to get amavisd-new and spamassassin going on a centos
machine, running postfix with mailman. The setup has a few quarks,
spamassassin isn't as tight as i'd like and i'm looking where to set up
additional rules and scores, and occationally i get bounce messages for
mailman at mydomain.com.
	Any takers?
	Thanks.
Dave.