Thanks, I'll check it out.
I have been using
http://sneakemail.com
for a few years now with some success. This isn't a filter program at all. Instead you create these fake email addresses that autoforward any mail you receive from one of them to your valid email accounts. While it doesn't stop the spam, if you set up a different fake account for any site you register for you can easily determine which sites have sold your email account. Then, by deleting the fake account, you stop the spam from those sites.
Anyway, it works for me.
I've been using Sneakemail for a long while now. It is the bomb.
With Sneakemail, Mailwasher, Popup-Stopper and a good hardware firewall...nobody bothers me.