For a long period I was spammed with 5-10 emails every day.
A few weeks ago I decided to se if it was possible to stop the spamming as it is a pain in the b..
Via Google I found this page
http://www.spamcop.net - they send warning information to the internet service provider responsible for hosting the services used by the spammer.
Well, I filed a free report on each of the spammails I had received the last two days and havnt received any spammails for the last 14 days !
Try them, I am quite sure it will help you get rid of these irritating mails.