Hello,

How can I drop external messages with a return address from our domain?
Recently, we have had a number of such messages enter our mail server. For
example;

<snip>
Return-Path: jam...@musicreports.com
Received: from mri-mail.musicreports.com (LHLO mri-mail.musicreports.com)
 (192.168.20.65) by mri-mail.musicreports.com with LMTP; Mon, 15 Jun 2009
 11:43:54 -0700 (PDT)
Received: from localhost (localhost [127.0.0.1])
        by mri-mail.musicreports.com (Postfix) with ESMTP id F3A00280DF60F
        for <jam...@musicreports.com>; Mon, 15 Jun 2009 11:43:53 -0700
(PDT)
X-Virus-Scanned: amavisd-new at mri-mail.musicreports.com
Received: from mri-mail.musicreports.com ([127.0.0.1])
        by localhost (mri-mail.musicreports.com [127.0.0.1]) (amavisd-new,
port 10024)
        with ESMTP id SueHFnvM9Ltm for <jam...@musicreports.com>;
        Mon, 15 Jun 2009 11:43:45 -0700 (PDT)
Received: from 20129241200.user.veloxzone.com.br (unknown [201.19.168.82])
        by mri-mail.musicreports.com (Postfix) with ESMTP id C16F0280DF613
        for <jam...@musicreports.com>; Mon, 15 Jun 2009 11:43:38 -0700
(PDT)
Message-Id: <wzfdez37313.a241...@20129241200.user.veloxzone.com.br>
From: "Krenz Megan" <jam...@musicreports.com>
To: jam...@musicreports.com
<snip>

I don't want to enable dns lookups since I don't want to reject valid
mail, however how can I stop these types of messages?

Many thanks in advance for your help.

James

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