I am posting in this forum because I don't realy know where else to post my question. Read, you will understand ;-)
I own a dommain, hosted on my own Linux server trough a cable connection.
I have a problem with my mail since I receive hundreds of non delivered mails witch I never sent.
I dig the maillog of PostFix (witch security is pretty tight) and I can't find traces of intrusion or any kind of relaying.
I know it is pretty simple to mangle the email header to set the FROM adress of the mail.
Now the real question is : Since the mail does not realy come from my dommain and only the FROM and RETURN adresses have been set to my dommain, is there any way I could avoid this ??
Here is a sample of non delivered message I receive:
This message was created automatically by mail delivery software.
A message that you have sent could not be delivered to one or more
recipients. This is a permanent error. The following address(es) failed:
<email@example.com>: 554 Denied [CS] (Mode: normal)
<firstname.lastname@example.org>: 554 Denied [CS] (Mode: normal)
<email@example.com>: 554 Denied [CS] (Mode: normal)
<firstname.lastname@example.org>: 554 Denied [CS] (Mode: normal)
Included is a copy of the message header:
Received: from unknown [188.8.131.52] (EHLO mail.gemappraisers.com)
by p02c11m022.mxlogic.net (mxl_mta-5.1.0-1)
with ESMTP id 1e4d2d64.2594122672.175488.00-189.p02c11m022.mxlogic.net (envelope-from <email@example.com>);
Mon, 27 Aug 2007 07:42:57 -0600 (MDT)
Received: from 184.108.40.206 (HELO mail1.no-ip.com)
by charlesligeti.com with esmtp (YA000*:;RH0 Z,+5)
for firstname.lastname@example.org; Mon, 27 Aug 2007 13:42:58 -0100
Date: Mon, 27 Aug 2007 13:42:58 -0100
From: "Janet Sherwood" <email@example.com>
X-Mailer: The Bat! (v3.71.14) UNREG / CD5BF9353B3B7091
X-Priority: 3 (Normal)
Subject: Last chance to supercharge your performance
X-Spam: Not detected
Received: from unknown [220.127.116.11] (EHLO mail.gemappraisers.com)=> this is not my dommain ;-)
Any advise would be nice :-)