Undelivered Mail Returned to Sender

From: Mail Delivery System <MAILER-DAEMON(*)dns.immobilienbank.de>
Date: Fri, 12 Oct 2007 18:46:38 +0200 (CEST)
To: test.tester(*)testcompany.com

This is the Postfix program at host dns.immobilienbank.de.

I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <postmaster>

If you do so, please include this problem report. You can delete your own text from the attached returned message.

The Postfix program

<test.testmann(*)westimmobank.com>: host 10.50.1.58[10.50.1.58] said: 550

test.testmann(*)westimmobank.com... No such user (in reply to RCPT TO command)

attached mail follows:

Received on Fri Oct 12 2007 - 12:46:40 EDT