On Wed, Dec 08, 2004 at 10:37:43PM -0000, egcrosser wrote: > 2. > I find it very a compelling idea to have dynamic greylisting delay, > per sender IP (or sender domain for SPF-verified submissions), growing > if there are many submissioons for non-existent users from the IP. > This would be kinda simple reputation system. The basic problem with that idea is that you will only hurt real mail servers with this scheme. My e-mail server has received over 1400 mails to non existing addresses in the last 18 hours. As far as I can see there is not a single spam e-mail between those. All those message are bounces caused by spammers. By rejecting the mail server trying to deliver that bounce you will only make that class of problems worse. I'm sorry but your idea is broken by design. Kind regards -- Matthias Scheler http://scheler.de/~matthias/
Message
Why a reputation system is bad (was: A few new user's thoughts)
2004-12-16 by Matthias Scheler