I get a shitpot full of spam every day. I recommend, and use, the SpamAssassin plugin for Outlook in order to manage all of this. It’s pretty effective.
This article addresses many of the big beefs that I have with the whole spam blacklist system – I don’t believe in blocking ISP IPs other than those sending spam simply because it doesn’t make a good business practice. I also don’t believe in some of the little dictatorial cabals out there that run some of the blacklists, such as SPEWS… If you want to do it, own up to it.
My big beef is really with spamcop. They have their own defination of spam that I happen to disagree with…. Double-Opt-In? Keep the records?
Some of the anti-spam folks are serious conspiracy theorists….