Count me as a regular who would really miss this site were it to go away.
I have a different, yet still annoying, mail problem with my board: some admin messages are sent from the board with a gmail address as the reply-to. Every now and then, a recipient's mail service (yahoo and aol most often) will reject it, and sometimes my gmail deems it spam.
As to forum spam, my board poses one of a few (on-topic yet obscure) questions to registrants to keep spambots out, and it works pretty well. For the several a day who clear that hurdle, I check IP and email to see if they show as spammers and only a small fraction do. More common are the almost-on-topic folks trying to use us to advertise their sites.
-jk