Jacob Leaver wrote:
Check out maia: www.maiamailguard.com Based on amavisd-new, it supplies all the professional outsourced filter style features. Using it with clamav, I've never received a virus, and it's been 99.28 percent effective with my spam situation, better numbers than I've gotten from postini.
I second the recommendation for Maia Mailguard. It's sweet, albeit a bit tricky to get setup. The best part of it is the web-based management for users. I even got my very non-technical wife using it, and she loves it.
-Ryan