Spammers are like roaches. They are here to stay. They are aggressive. They adapt.
spam is a drug, and spammers will do anything, anything at all, for a fix.
We need to respond with a variety of mechanisms, preferably coordinated to maximize the aggregate effect.
i still disagree. we need to call smtp a total loss and start over, from the basic question: how can mutual consent be prerequisite to communication? the difference between spam and ddos is a matter of statefulness -- but the motives for sending it are essentially the same: asymmetric benefit to the sender, and without consent of the recipients. watching the growth of the anti-ddos and anti-spam industries makes the internet look like a grade school science fair project run amok. -- Paul Vixie