Skickar jag spam?

Får emellanåt mail från "mailerdeamon@vilketsom helst" om mail som inte går att leverera, men jag skickar ju inga mail!
en "header"

X-Rocket-Spam: 217.223.71.22
X-YahooFilteredBulk: 217.223.71.22
X-Track: 2296: 20
X-Rocket-Server: 66.163.174.36
Return-Path: <Min adress@hotmail.com>
Received: from vma-ext.prodigy.net (207.115.63.86)
by mta811.mail.yahoo.com with SMTP; 19 Mar 2003 20:35:09 -0800 (PST)
X-Header-Overseas: Mail.from.Overseas.source.217.223.71.22
X-Originating-IP: [217.223.71.22]
Received: from hotmail.com (host22-71.pool217223.interbusiness.it
[217.223.71.22])
by vma-ext.prodigy.net (8.12.3 patch/8.12.3) with SMTP id h2K4YeKZ240768;
Wed, 19 Mar 2003 23:34:42 -0500
Message-ID: <000101b8be13$ddb71624$72310661@ldpc.idge>
From: <Minadress@hotmail.com>
To: <jeffg@flash.net>
Cc: <bahunter@flash.net>, <lisafox@flash.net>, <gangrel@flash.net>,
<gregjohn@flash.net>, <harding@flash.net>, <gann@flash.net>,
<jeffgus@flash.net>, <ganske@flash.net>, <lisahop@flash.net>,
<bailey13@flash.net>, <drpat@flash.net>, <carolbee@flash.net>,
<whblack@flash.net>
Subject: Increase your penis size naturally or your money back!
Date: Thu, 20 Mar 2003 13:05:50 -0900
MIME-Version: 1.0
Content-Type: text/html;
charset="us-ascii"
X-Priority: 1
X-Mailer: {%xmailer%}
Importance: Normal

Tolkning efterfrågas.
Eller är det bara någon korkad robot som har lagt mig på "return-path"