If this person is spamming you through the site, the email is going to show that it was sent through the site. They cannot pull your email addy from this site and contact you directly unless you've typed out your email address in one of your posts.
If the email shows that the message came from ssnakess.com, send a copy to Jeff ******** at email@example.com
and I'm sure he'll be happy to deal with the problem for you. From his past posts on this matter I gather he doesn't take kindly to spammers harassing site members.