Again, I apologize. The only way I can keep him from doing what he's doing is to completely disable the ability to email other forum members, and I don't think anyone wants that.
To reiterate what others have said, he is an individual trying to gather interest for his forum, and is not a true "spammer" with malicious intent (malware or viruses). You shouldn't hear from him more than once, and if he continues to bother you, please make me aware.
Thanks all!