From: "Alexander Dalloz" <ad+lists@xxxxxxxxx>
You can consider using amavisd-new from Fedora Extras (this way you too can add anti-virus checking by ClamAV). For smaller systems it is worth to read.
Trouble is you nearly have to emasculate amavisd-new to get it to behave in a proper manner. I prefer procmail. And with the clamscan plugin for SpamAssassin I still get the AV scanning. 'ix is lovely. There are so many good ways to do things. But I do love my procmail. I literally have it setup to play tunes for me - when custormer email comes in. {^_-}