I see that bagginsbill is conserned about,

SPAM

... and that he got an eMail to,

an address that only exists in two places - my Renderosity member
database entry, and my email account forwarding system.

Did you check with the admin for your eMail forwarding system? 

I get some SPAM that does not actually have my eMail address ...
it seems that some rogue eMail programs are able to 'trick' my ISP's
POP3 server into accepting such SPAM eMails. 

HTH, but YMMV

--
Martin