Ted >

Trace your spammer back to his host network and get them added to the Real time black hole list (For more info on the RBL see: http://mail-abuse.org/). The RBL is just the sort of thing you suggest - network admins clubbing together to protect their users from the scourge of spam.

Then you can use the RBL data to dissallow incoming connections from Banned IPs to your mail server. Spammers get a neat little message saying that they have been blackholed. (So does everyone else on their network but hey - you can't make sushi without slicing fish - read the docs carefully!).

When an ISP becomes balckholed they very quickly find the user that has been spamming and ban that user instantly (so as to get removed from the RBL list).

It would be nice to be able to pull a few of ones blacker peices of code from ones toolbox and teach the spammers a lesson. It would also be nice to be able to open ones mail without fear of a deluge of non-family-friendly advertising.

But fear leads to anger, anger leads to hate, hate leads to the dark side; and the Dark Side leads to prison, Big Black Bubba, and a sore ringer. Using the realtime backhole list is almost as fun as a DDOS but without the danger of the sore ringer.