the unwanted mailing list

I am on this chap's mailing list. I don't know who he is and what he does. All I know is that I get around eight e-mail forwards from him daily. I don't want to be on his list. I don't know how to un-subscribe. I tried tagging him as spam. But the spam filter likes him for some strange reason. I still get his forwards, the ones he deems funny, the ones he feels that I should see and yes the ones he feels that I should forward to my friends and their friends.