Mark, look at the header on one of the emails. You may have to do something to "show headers" or something. There should be a series of "Received:" fields. They will look something like:

Received: from rly-ip03.mx.aol.com (rly-ip03.mx.aol.com [64.12.138.7])
by mail1.greatbasin.net (8.12.2/8.12.2) with ESMTP id gAFFR0pg030187
for ; Fri, 15 Nov 2002 07:27:00 -0800

Received: from logs-wg.proxy.aol.com (logs-wg.proxy.aol.com [205.188.196.5])
by rly-ip03.mx.aol.com (v89.10) with ESMTP id RELAYIN8-1115102632; Fri, 15 Nov 2002 10:26:32 -0400

Received: from Vmkyed (AC8DE033.ipt.aol.com [172.141.224.51])
by logs-wg.proxy.aol.com (8.10.0/8.10.0) with SMTP id gAFFHZ3431553
for ; Fri, 15 Nov 2002 10:17:35 -0500 (EST)

Look at the bottom "received" section, at the first IP address in that section (172.141.224.51 in the axample above). That will identify the true sender. Post that number here on the board, and Greg can see if it matches a recent post.