Returned mail: User unknown

[Jim Herrmann]

Hostrocket and AOL,
Some one is spoofing my address, which is hosted at Hostrocket.com, to
spam AOL addresses.  There is no such user, critchleylk in my domain.
This is going to get my domain blacklisted if it doesn't stop.  What can
I/you/we do to prevent it?  Any suggestions would be appreciated.

Thanks,
Jim Herrmann
Owner of ItDepends.com domain

-------- Original Message --------
Subject: 	Returned mail: User unknown
From: 	Mail Delivery Subsystem <MAILER-DAEMON at aol.com>
To: 	<critchleylk at itdepends.com>

The original message was received at Tue, 25 Nov 2003 16:51:56 -0500 (EST)
from mout1.freenet.de [194.97.50.132]

*** ATTENTION ***

Your e-mail is being returned to you because there was a problem with its
delivery.  The address which was undeliverable is listed in the section
labeled: "----- The following addresses had permanent fatal errors -----".

The reason your mail is being returned to you is listed in the section
labeled: "----- Transcript of Session Follows -----".

The line beginning with "<<<" describes the specific reason your e-mail could
not be delivered.  The next line contains a second error message which is a
general translation for other e-mail servers.

Please direct further questions regarding this message to your e-mail
administrator.

--AOL Postmaster

----- The following addresses had permanent fatal errors -----
<lie0227 at aol.com>

----- Transcript of session follows -----
... while talking to air-yb02.mail.aol.com.:
>>> RCPT To:<lie0227 at aol.com>
<<< 550 MAILBOX NOT FOUND
550 <lie0227 at aol.com>... User unknown