Confusing part is that my "web site" is no where in the header.

"CornerOak.com" seems to be a real place. And they/he may actually be getting SPAMmed, but not by me or "my web site."

Perhaps
his server is the one with the virus?

Sure glad he has Microsoft looking out for him...

Raw source (in the two images, the PHP server didn't like seeing the text, even as "pre," "code" or "quote") of the message I got with my actual email address 'edited' slightly:
[attachment=1215:SPAMSCAM_top.jpg]
[attachment=1216:SPAMSCAM_bottom.jpg]