We bumped into these guys today and found the tool to be pretty cool.
1. Go here –> I Don’t Spam Web Page.
2. Sign up. Takes 30 seconds. Free.
3. Wait a little bit to get approved. Took a couple hours for them to check my site.
Actually pretty darn cool, as they check you against all of the CAN-SPAM questions – verified opt-in, opt-out, etc.