[CentOS] Can someone point me in the direction of a quick postfix/fetchmail setup example?

Thu Sep 15 17:50:42 UTC 2005
Preston Crawford <me at prestoncrawford.com>

I need to start doing some email filtering. Can someone point me in the 
direction of how to do this if they have a link handy? If not I'll Google 
anyway, but I thought I'd ask just in case.

Preston