Spam-generating error messages

Aargh. Could somebody set the Mail server to drop these "error" messages 
silently? trn-workers would NEVER be a legitimate From address. I'd rather 
the list stay entirely silent then get all this spam-generating error 
messages.

--------- Forwarded message ----------
Return-Path: <trn-workers-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Sender:  <trn-workers-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Message-ID: <E1HEqvK-0004kG-Oo-qGaTmy9+pjmsPNAail0dy6QD96bmaF075NbjCUgZEJk@public.gmane.org>
To:  <[email protected]>
Subject: Warning: message 1HDkF1-0007fz-H0 delayed 72 hours
From: Mail Delivery System <[email protected]>
Date: Wed, 07 Feb 2007 09:49:38 -0800

This message was created automatically by mail delivery software.
A message that you sent has not yet been delivered to one or more of its
recipients after more than 72 hours on the queue on externalmx-1.sourceforge.net.

The message identifier is:     1HDkF1-0007fz-H0
The subject of the message is: of Beor the woman was Carshena 
The date of the message is:    Sun, 04 Feb 2007 18:29:21 +0200

The address to which the message has not yet been delivered is:

  [email protected]
    Delay reason: SMTP error from remote mailer after RCPT TO:<[email protected]>:
    host mail.sourceforge.net [66.35.250.206]: 451-Could not complete sender verify callout
    451-Could not complete sender verify callout for
    451-<[email protected]>.
    451-The mail server(s) for the domain may be temporarily unreachable, or
    451-they may be permanently unreachable from this server. In the latter case,
    451-you need to change the address or create an MX record for its domain
    451-if it is supposed t

No action is required on your part. Delivery attempts will continue for
some time, and this warning may be repeated at intervals if the message
remains undelivered. Eventually the mail delivery software will give up,
and when that happens, the message will be returned to you.

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-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier.
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642