misdirected mailer error messages

Can someone please tell me why our postmaster alias is being bombarded with
dozens of these Mailer-Daemon problem messages from the www-talk list (whatever
that is)?

Thanks,

Jim
symon@radonc.unc.edu



From Mailer-Daemon Tue Nov  7 12:29:50 1995
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Date: Tue, 7 Nov 95 12:29:42 EST
From: Mailer-Daemon (Mail Delivery Subsystem)
Subject: Returned mail: Host unknown
Message-Id: <9511071729.AA18403@godot.radonc.unc.edu>
To: Postmaster
Status: R

   ----- Transcript of session follows -----
421 Host fep20.fns.com not found for mailer ddn.
550 rar@fep20.fns.com... Host unknown

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Date: Tue, 7 Nov 1995 12:20:22 -0500
To: Daniel DuBois <ddubois@rafiki.spyglass.com>
From: nazgul@utopia.com (Kee Hinckley)
Subject: Re: Netscape 2.0 beta MS windows 95 virus
Cc: www-talk@www10.w3.org
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Received on Tuesday, 7 November 1995 12:34:35 UTC