SpamAbuse
SpamAbuse helps you report and punish spammers for sending you their junk e-mail. This is a completely free service. Often, by reporting spammers, they can lose their accounts and even get charged "fees" by their Internet Service Providers. In addition, reporting spam to SpamAbuse results in blacklisting the sites responsible for allowing it to be sent. SpamAbuse not only reports spammers once, but tracks them down and follows their provider, reporting them continuously as they try to change their tactics and move from ISP to ISP. By reporting spam, you can help to turn the tide on spammers. SpamAbuse makes this otherwise slow and technical task quick and easy and we follow up to make sure these spammers get banned for good.


http://www.spamabuse.org/