I have received several (let's say "dozens") of spams identified as from your user "kterefe". A sample link below:

http://www.infermed.com/Members/kterefe/Document.2006-11-20.2275556059/

(S)he is not actually using your facilities to send the spam — they come from a variety of IPs, probably hijacked and turned into zombie machines — but all the links therein point to one of kterefe's "Members" pages, such as the one above.

I trust that this will be a simple matter for you to take care of, and I thank you for listening.

cgh