The problem may not be only LISTSERV list mail.  See below.    Douglas

---------- Forwarded message ----------
Date: Mon, 28 Dec 1998 13:17:09 -0500
From: Don Wall <[log in to unmask]>
To: [log in to unmask]
Subject: Spurious mail

Douglas:
I dunno if this is what you are looking for, but I have had multiple copies
of this bugger over the past 5-6 days. This is way above my average spam
volume.

X-From_: [log in to unmask]  Mon Dec 28 12:03:07 1998
X-Apparently-To: <[log in to unmask]>
Received: from www.freeyellow.com (04-205.009.popsite.net [207.227.230.205])
        by hydra.cybertap.com (8.9.1a/8.9.1/Debian/GNU) with SMTP id MAA17740
        for <[log in to unmask]>; Mon, 28 Dec 1998 12:03:04 -0500
From: [log in to unmask]
Message-Id: <[log in to unmask]>
To: <[log in to unmask]>
Subject: Get .05cpm Long Distance 24Hours 7Days A  Week & SUPERLOW

Good luck eh! <g>.