Was ist das für eine Mail???

Hy Ihrs,
ich bekomm in regelmäßigen Abständen eine Mail von Mail Delivery System mit dem Betreff Mail delivery failed: returning message to sender. Der Inhalt ist wie folgt:

[code] This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. The following addresses failed:

SMTP error from remote server after transfer of mail text:
host mx.freenet.de[194.97.55.147]:
550 Syntax error in header

— The header of the original message is following. —

Received-SPF: none (mxeu0: 61.49.102.239 is neither permitted nor denied by domain of meprowe.com) client-ip=61.49.102.239; envelope-from=mail@meprowe.com; helo=drunkemail.net;
Received: from [61.49.102.239] (helo=drunkemail.net)
by mx.kundenserver.de (node=mxeu0) with ESMTP (Nemesis),
id 0MKpIi-1GKcTD3qHu-0005AU for mail@modellbahn-liebscher.de; Tue, 05 Sep 2006 17:04:19 +0200
Received: from 200.79.20.20
(SquirrelMail authenticated user xdtpynyb);
by drunkemail.net with HTTP id J85Gz020618882;
Tue, 05 Sep 2006 14:55:12 +0000
Message-Id:
Date: Tue, 05 Sep 2006 14:55:12 +0000
Subject: How much does your image cost?
From: \”Ilona\”
To:
User-Agent: SquirrelMail/1.4.3a
X-Mailer: SquirrelMail/1.4.3a
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 7bit
X-Priority: 3 (Normal)
Importance: Normal
[/code]

bzw.

[code]This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. The following addresses failed:

SMTP error from remote server after transfer of mail text:
host mx.freenet.de[194.97.50.138]:
550 Syntax error in header

— The header of the original message is following. —

Received-SPF: none (mxeu20: 71.204.106.255 is neither permitted nor denied by domain of meprowe.com) client-ip=71.204.106.255; envelope-from=mail@meprowe.com; helo=emailnewsletters.net;
Received: from [71.204.106.255] (helo=emailnewsletters.net)
by mx.kundenserver.de (node=mxeu20) with ESMTP (Nemesis),
id 0MKpEa-1GJgp32IDR-0005Il for mail@modellbahn-liebscher.de; Sun, 03 Sep 2006 03:30:55 +0200
Received: from 192.245.59.188
(SquirrelMail authenticated user ynoffhbx);
by emailnewsletters.net with HTTP id J85Gz020618882;
Sun, 03 Sep 2006 01:27:19 +0000
Message-Id:
Date: Sun, 03 Sep 2006 01:27:19 +0000
Subject: How to double your company recognition on the market?
From: \”Sherill\”
To:
User-Agent: SquirrelMail/1.4.3a
X-Mailer: SquirrelMail/1.4.3a
MIME-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 7bit
X-Priority: 3 (Normal)
Importance: Normal
[/code]

Ich weiss nicht recht, was ich damit anfangen soll. Ich hab weder \’ne freenet-Adresse noch einen Account bei 1&1 (kundenserver.de). Kann das ein Sicherheitsleck in einem Skript auf der modellbahn-Domain sein?
Weshalb bekomme ich den Daemon?

Danke für die Tipps.
Ben