[121357] in North American Network Operators' Group
Re: SORBS on autopilot?
daemon@ATHENA.MIT.EDU (Leo Bicknell)
Fri Jan 15 14:09:45 2010
Date: Fri, 15 Jan 2010 11:08:52 -0800
From: Leo Bicknell <bicknell@ufp.org>
To: nanog@nanog.org
Mail-Followup-To: nanog@nanog.org
In-Reply-To: <4CF2B345-18A6-4193-AA42-EEBF56E3BAF8@jedsmith.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
--rwEMma7ioTxnRzrJ
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
In a message written on Fri, Jan 15, 2010 at 01:26:49PM -0500, Jed Smith wr=
ote:
> Let me reiterate for the benefit of Ricky Beam, Ken Chase, Leo Bicknell, =
Paul,
> and anybody else who is tempted to debate Michelle in this thread: you ar=
e 100%
> wasting your time.
Good advice, for sure. Fortunately in this case I have no interest in
debate. I've posted my $0.02, and I'll let people take that for what it
is....
> Your time is much better spent contacting every mail administrator on the
> Internet who 5xx's your relay's mail, or asking your upstream to move you=
out of
> the affected block. Both will result in more productivity than debating =
anybody
> that works for SORBS or who is a colleague of Michelle Sullivan. You mig=
ht be
> right, she might be right, and in either case it doesn't matter. Move on.
> There are far more pressing matters in life.
There is something to be learned here. Blocking e-mail based on
ANY single service is likely to be a disservice to you and your
customers. I have yet to see a "mistake free" block list from
anyone.
Tools such as SpamAssassin allow you to score e-mail based on
responses from many services, including SORBS. Make sure you're
using 6+ services, and at least two, and preferrably three must
agree before you toss the mail as spam.
So when you contact that mail admin, tell them to remove whatever
DNSBL's they have at the SMTP transport level and let SpamAssassin,
or a Barracuda, or other similar tool make decisions based on
corroborating multiple sources of information.
--=20
Leo Bicknell - bicknell@ufp.org - CCIE 3440
PGP keys at http://www.ufp.org/~bicknell/
--rwEMma7ioTxnRzrJ
Content-Type: application/pgp-signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.13 (FreeBSD)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=o1sm
-----END PGP SIGNATURE-----
--rwEMma7ioTxnRzrJ--
