On Sun, Jun 29, 2008 at 07:55:07AM -0700, Roger Marquis wrote:
Backscatter / NDNs are another issue. In practice they are no longer feasible without assurance that the sender is both valid and legitimate. Bounces without these validations are usually spam and will get your server blacklisted.
A fine point that I don't see mentioned much is that REJECT-ON-SMTP-DATA has the nice side effect that if it's real mail, the *sender's* MTA will generate their bounce for them, and if it's a spammer, they'll ignore it. So you get the best of both worlds, which seems an excellent reason to go through the effort of setting it up that way. Cheers, - jra -- Jay R. Ashworth Baylink jra@baylink.com Designer The Things I Think RFC 2100 Ashworth & Associates http://baylink.pitas.com '87 e24 St Petersburg FL USA http://photo.imageinc.us +1 727 647 1274 Those who cast the vote decide nothing. Those who count the vote decide everything. -- (Joseph Stalin)