One of our customers received a strange email from MAILER-DAEMON.
It is a spam-mail forwarded by the zimbra mailerdaemon.
Whats going wrong here?


Received: from mail.mydomain.xy (LHLO mail.mydomain.xy) (192.168.100.95) by
mail.mydomain.xy with LMTP; Sat, 21 Aug 2010 20:45:11 +0200 (CEST)
Received: from localhost (localhost.localdomain [127.0.0.1])
by mail.mydomain.xy (Postfix) with ESMTP id 065F03E8002
for <customer@mydomain.xy>; Sat, 21 Aug 2010 20:45:11 +0200 (CEST)
X-Virus-Scanned: amavisd-new at mydomain.xy
X-Spam-Flag: NO
X-Spam-Score: 3.892
X-Spam-Level: ***
X-Spam-Status: No, score=3.892 tagged_above=-10 required=5
tests=[BAYES_00=-1.9, FH_FROMEML_NOTLD=1.082,
MSGID_FROM_MTA_HEADER=0.001, RCVD_IN_NJABL_PROXY=2.224,
RCVD_IN_RP_RNBL=1.31, RCVD_NUMERIC_HELO=1.164, T_FRT_CONTACT=0.01,
UNPARSEABLE_RELAY=0.001] autolearn=no
Received: from mail.mydomain.xy ([127.0.0.1])
by localhost (mail.mydomain.xy [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id 078Nx1QqwR7r for <customer@mydomain.xy>;
Sat, 21 Aug 2010 20:45:07 +0200 (CEST)
Received: from mi-ob.rzone.de (mi-ob.rzone.de [81.169.146.149])
by mail.mydomain.xy (Postfix) with ESMTPS id 624F33E8001
for <customer@mydomain.xy>; Sat, 21 Aug 2010 20:45:05 +0200 (CEST)
X-RZG-FWD-BY: customer@mydomain.xy
Received: from RZmta-internal (client mail forwarder)
by mailin.webmailer.de (voltan mi19) (RZmta 23.5)
for <customer@mydomain.xy>; Sat, 21 Aug 2010 20:44:25 +0200 (MEST)
Message-ID: <R05c32m7LIZXjG.RZmta@mailin.rzone.de>
X-RZG-CLASS-ID: mi
Received: from apple2.w3link.net ([198.252.166.91])
by mailin.webmailer.de (voltan mi19) (RZmta 23.5)
with ESMTP id R05c32m7LIZXjG for <customer@mydomain.xy>;
Sat, 21 Aug 2010 20:44:25 +0200 (MEST)
Date: Sat, 21 Aug 2010 14:44:01 -0400
Received: from 84.122.131.85 ([84.122.131.85])
(authenticated user robblackey@protectplus.com)
by apple2.w3link.net (Kerio MailServer 6.6.2)
for customer@mydomain.xy;
Sat, 21 Aug 2010 14:43:48 -0400
To: customer@mydomain.xy
Subject: Die Vakanz fur Sie,Vakanz, Die Vakanz von Grand Exchange, Job als Testkaufer.
From: MAILER-DAEMON@mail.mydomain.xy