[140930] in North American Network Operators' Group
Re: blocking annoying 'bounce mail' "feature" from customers use.
daemon@ATHENA.MIT.EDU (Jeroen Massar)
Wed May 25 12:20:03 2011
Date: Wed, 25 May 2011 18:18:39 +0200
From: Jeroen Massar <jeroen@unfix.org>
To: Eric J Esslinger <eesslinger@fpu-tn.com>
In-Reply-To: <D2D37F15EBBD524693E9F3CB32D02080219B775069@exchange.corp.fpu-tn.com>
Cc: "'nanog@nanog.org'" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2011-May-25 18:09, Eric J Esslinger wrote:
[..]
> Does anyone know of a way for me to block the following, using
> postfix, either via refusing to accept the mail or by dropping it in
> /dev/null: Mail from <> or postmaster that originates within our
> customer IP blocks/is sent using authentication at the submission
> port and/or that does not have a valid local recipient.
http://www.postfix.org/header_checks.5.html
But you should be lucky your customers are actually using your SMTP
relay in the first place instead of just bouncing directly to the target MX.
Greets,
Jeroen
