There is a cool new spam prevention system called Trustic. It is designed to be a trust system. Basically you vote on IP addresses to say if you would take mail from them or not. It was created by Mark Fletcher. He was the brain behind what is now Yahoo Groups. It is a very promising looking system. It’s in beta now so there are still some things to be fixed. Right now it works pretty darn well. I blocked 8000 pieces of spam around the world yesterday because of my contribution to the system. That’s one really cool thing about the system. Each day you get an email telling you how you have contributed to the system. This is really worth a look if you are a mail admin or even an end user of email services.