mta bzw. ?? ändert email header?

[muell200]

hallo

bei mir kommt es immer wieder vor, das der email-header bzw. der empfänger geändert wird.
z.b.: email an: user@xxx.de
-> wird vom mta, virenscanner, spamfilter,.. geändert auf: firma-user@xxx.de
( Delivered-To: siehe unten..)
die email bekommt der postmaster...

mein system:
sendmail 8.11.3, ClamAV 0.81, AntiVir MailGate 2.0.2-9

poste mal ein email header ( beispiel )


Return-Path: <9oMgjnRU@msn.com>
Received: from localhost (localhost [127.0.0.1])
by luft.xxxr.de (8.11.3/8.11.0/SuSE Linux 8.11.0-0.4) with ESMTP id j3S2oBj09495
for <ja.miller@xxx.de>; Thu, 28 Apr 2005 04:50:11 +0200
Received: from localhost
by localhost (AvMailGate-2.0.2-9) id 09481-1E6D46EC;
Thu, 28 Apr 2005 04:50:11 +0200
Received: from xxx.de
by localhost with POP3 (fetchmail-5.8.0)
for ja.miller@xxx.de (multi-drop); Thu, 28 Apr 2005 04:50:11 +0200 (CEST)
Received: from [210.121.250.227] (helo=xxx.de)
by www10.your-server.de with smtp (Exim 4.50)
id 1DQz1K-0002qQ-5q
for ja.miller@xxx.de; Thu, 28 Apr 2005 04:44:55 +0200
Received: from tbugeyed .noc.ucla.edu (HELO tkeynesian .noc.ucla.edu [4.127.174.132])
by pbrim .noc.ucla.edu (8.60.5/8.12.5) with ESMTP id h0I08bcG003680
for <9oMgjnRU@msn.com>; Thu, 28 Apr 2005 02:44:37 -0500
Envelope-to: ja.miller@xxx.de
Delivery-date: Thu, 28 Apr 2005 04:44:55 +0200
Message-Id: <1013842248.4285.7.camel@lsanca1-ar15-4-60-997-069.lsanca1.dsl-preservation .net>
From: "Cecilia Jerold" <9oMgjnRU@msn.com>
To: ja.miller@xxx.de
Date: Thu, 28 Apr 2005 02:41:33 -0400
Subject: Two hundred and thirty thousand dollars for only $320/month
X-Virus-Scanned: Clear (ClamAV 0.81/856/Wed Apr 27 09:00:37 2005)
X-Spam-Score: 12.6 (++++++++++++)
X-Spam-Flag: YES
Delivered-To: firma-ja.miller@xxx.de
X-AntiVirus: checked by AntiVir MailGate (version: 2.0.2-9; AVE: 6.30.0.7; VDF: 6.30.0.141; host: luft)

wer ändert den header?
Danke