I have a spammer using my free e-mail service.  I've tried deleting their 
account, but since I have a online signup they just signup again.  Below is a 
header that was sent to me by one of many people reporting spam from my 
domain.  As you can see the return address is 
<[EMAIL PROTECTED]> CoolPeople.net is one of my mail domains 
but I don't offer any subdomain addresses (the vmwnl was their addition).  I 
disabled web access for this account ([EMAIL PROTECTED]) and I've 
changed their password.  So I don't believe they are actually spamming from 
me or even relaying across my servers, but they are using one of my addresses 
in the return address.  How can I tell whether or not this message somehow 
originated from my machine?  How can I stop this abuse of my service?  I 
don't want to get my domains blacklisted for spamming.  Help.

Headers from SPAM sent apparently by one of my free e-mail users FOLLOWS


==================
HEADER
==================

Received: from 8tdonr.fortune2.com (ip94.saginaw.mi.pub-ip.psi.net 
[38.11.209.94]) 
by jamd370.majors.com (8.8.6 (PHNE_17190)/8.8.6) with SMTP id XAA24736; 
Tue, 9 May 2000 23:16:18 -0500 (CDT) 
Date: Wed, 10 May 2000 00:13:55 -0500 
Message-Id: <[EMAIL PROTECTED]> 
To: @jamd370.majors.com 
From: [EMAIL PROTECTED] 
Content-Type: text/plain; 
  charset="iso-8859-1" 
Content-Transfer-Encoding: 8BIT 
Subject: Would You Like To Earn 2k to 5k Weekly -myok 

=================
end of header
=================

-thanks
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