Spam-fighters have been dealing with those issues for years. A good first approach is to fill out http://www.spamcop.net/anonsignup.shtml http://www.spamcop.net

Spam-fighters have been dealing with those issues for years. A good first approach is to fill out http://www.spamcop.net/anonsignup.shtml http://www.spamcop.net/anonsignup.shtml, which well send a standard mail to the people selling him bandwidth etc. You can also report him to various blocking lists, which will make sending mail harder for him. Etc. It is desirable to be anonymous while doing the above - spammers are generally not nice people, and tend to get rather angry when you cut off their livelihood.