From owner-freebsd-questions@FreeBSD.ORG  Wed May 12 21:50:18 2004
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Date: Wed, 12 May 2004 21:50:56 -0700 (PDT)
From: Viktor Lazlo <viktorlazlo@telus.net>
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To: Bob Perry <rperry4@earthlink.net>
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Subject: Re: Return Delivery of Mail I've never Sent
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On Wed, 12 May 2004, Bob Perry wrote:

> Just setup mutt and I've begun to notice mail return to me
> indicating that it did not pass the server content filter,
> etc.  The last one stated that a virus was found, file name
> disco.zip, virus name W32/Netsky.c@MM!zip and apprarently
> was found by McAfee Scanning Engine (4359/4.3.20).  What
> makes it worse is that the recipient is not recognizable.
>
> I understand that my system can be used as a mail relay and
> would like to know how to combat this.  Can anyone point me
> in the right direction so that I can quickly resolve this
> issue?

If the bounced email contains headers check to see if it originates from
your IP--most likely it is spoofing the return address.

Cheers,

Viktor