Please can You Help me for a unknow E-mail!!

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Date: Thu, 01 Apr 2004 20:21:24 +0200
From: querkraft@gmx.net
Subject: Re: Delivery Server
To: 19@daimlerchrysler.com
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Your message cannot be delivered to the following recipients:

Recipient address: @wklmssplit.wk.dcx.com:19@daimlerchrysler.com
Original address: 19@daimlerchrysler.com
Reason: Remote SMTP server has rejected address
Diagnostic code: smtp;550 19@daimlerchrysler.com... No such user
Remote system: dns;wkldoinall.wk.dcx.com (TCP|53.151.100.102|62474|53.151.100.133|25)