[105786] in North American Network Operators' Group
Re: Mail Server best practices - was: Pandora's Box of new TLDs
daemon@ATHENA.MIT.EDU (Jay R. Ashworth)
Tue Jul 1 11:04:49 2008
Date: Tue, 1 Jul 2008 11:04:31 -0400
From: "Jay R. Ashworth" <jra@baylink.com>
To: nanog@nanog.org
In-Reply-To: <20080629145507.D40D72B7C00@mx5.roble.com>
Errors-To: nanog-bounces@nanog.org
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)
