[95820] in North American Network Operators' Group
Re: Blocking mail from bad places
daemon@ATHENA.MIT.EDU (Ken Simpson)
Wed Apr 4 17:54:23 2007
Date: Wed, 4 Apr 2007 14:38:08 -0700
From: Ken Simpson <ksimpson@mailchannels.com>
To: John Levine <johnl@iecc.com>
Cc: nanog@nanog.org, peter@peter-dambier.de
Reply-To: Ken Simpson <ksimpson@mailchannels.com>
In-Reply-To: <20070404194324.55768.qmail@simone.iecc.com>
Errors-To: owner-nanog@merit.edu
--pfTAc8Cvt8L6I27a
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
> > 1) You send bounces from spammers to innocent people, whose
> > addresses have been forged.
>=20
> This is an SMTP reject, not a bounce. It's a lethal variety of
> greylisting.
>=20
> This technique works great to keep spam out of your mailbox.
Inline rejection is a little dangerous for mailing lists (because you
might be auto-unsubscribed), but IMHO it's better than receiving and
quarantining, because at least the sender can do something to resolve
the situation -- such as calling you to say their email was bounced by
your spam filter.
Providing a telephone number in the bounce is an effective way to deal
with false positives.
Regards,
Ken
--=20
Ken Simpson, CEO
MailChannels Corporation
Reliable Email Delivery (tm)
http://www.mailchannels.com
--pfTAc8Cvt8L6I27a
Content-Type: application/pgp-signature; name="signature.asc"
Content-Description: Digital signature
Content-Disposition: inline
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.3 (GNU/Linux)
iD8DBQFGFBrA2YHPr/ypq5QRAo53AJ9mY9Ayd6VsYCoXrmaqEQHLqrmjWQCcD2vC
zT5JrUlBjXL00VDgR0Xsx5c=
=VAdo
-----END PGP SIGNATURE-----
--pfTAc8Cvt8L6I27a--
