Someone is Spamming under MY E-MAIL ADDRESS!!!

Ok, for the last week or so, I've been recieving blank e-mails that appeared to come from my own e-mail address. Of course, the headers say otherwise. Just now I got an e-mail from my own e-mail address with an actual spam message!!

Here's my headers. My e-mail address has been changed to REMOVED.
I'm not sure what step to take next, so that would be great if someone could help me.

From - Sat Feb 05 22:11:43 2005
X-Account-Key: account1
X-UIDL: <044801c50bcf$36dc3857$8bd1cd3f@twinki>
X-Mozilla-Status: 0001
X-Mozilla-Status2: 00000000
Return-Path: <REMOVED>
Received: from fed1rmgxi15.cox.net ([24.224.23.161])
by fed1rmmtai05.cox.net
(InterMail vM.6.01.04.00 201-2131-117-20041022) with ESMTP
id <[email protected]>
for <REMOVED>; Sat, 5 Feb 2005 17:04:54 -0500
Received: from cox.net ([24.224.23.161]) by fed1rmgxi15.cox.net
(InterMail vG.1.00.00.00 201-2136-104-20040331) with SMTP
id <[email protected]>
for <REMOVED>; Sat, 5 Feb 2005 17:04:56 -0500
Message-ID: <044801c50bcf$36dc3857$8bd1cd3f@twinki>
Return-Path: REMOVEDFrom: "Peyton McFadden" <REMOVED>
CC: <REMOVED>
Subject: Need to loose a few pounds?
Date: Sat, 5 Feb 2005 16:07:43 -0600
Content-Type: text/plain; charset="ISO-8859-1"
MIME-Version: 1.0
From: <REMOVED>
X-Antivirus: AVG for E-mail 7.0.300 [265.8.5]

Sounds like a joe job (spammer forging your email addy; only thing that can be done about that is track down the source, and possibly alert your ISP as well so they don't wrongly hose your account). From what you posted, it looks like you need to complain to Pioneer Long Distance (pioncomm.net; origin; that's what 24.224.23.161 is). Not sure how spammer-friendly they are. You'll need to forward the entire email with full headers (don't change anything) to them.

http://www.samspade.org is how I got that IP info.

There's not really anything you can do. It's trivial to put ANYONE's mail address as the originating address in an email. Your address probably just came up from some automated harvester.