I'm interested in setting up SpamAssassin on a machine running Postfix. Is it possible to set up SA so that it only filters email addressed to specific users and not our domain as a whole? Yes and no.

I have an old server thats hosting mail for myself and a friend. Currently its a Gentoo based Postfix+Spamassasin+Clamav+Procmail+courier setup. The general setup is that mail gets delivered from ...