John, >> If we can communicate the fact that a message is discarded because it >> was categorized as spam back to the sender without adverse side
unfortunately, that act of communication _is_ the adverse side effect. it tells the spammer that yours is an active, responsive email account. d/ -- Dave Crocker <dcrocker-at-brandenburg-dot-com> Brandenburg InternetWorking <www.brandenburg.com> Sunnyvale, CA USA <tel:+1.408.246.8253>
