What is this e-mail?

Mon, 26 Aug 2002 11:42:43 -0700

Hi, all-

I just got an e-mail returned to me by postmaster@cox.net, but I didn't 
send the e-mail in question. The e-mail source is as follows- and there 
was apparently a file attached- what is this? Why am I getting returned 
e-mail which I never sent?

>From - Mon Aug 26 10:24:17 2002
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	for appealsman@cox.net; Mon, 26 Aug 2002 16:50:35 -0700
From: postmaster <postmaster@cox.net>
To: appealsman@cox.net
Subject: Undeliverable mail--"inserting missing "
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Message-Id: <E17jTcw-00037E-00@harrier.mail.pas.earthlink.net>
Date: Mon, 26 Aug 2002 16:50:35 -0700

--MR8491G3GqS58vN8a5S037x2101Kl10
Content-Type: text/html;
Content-Transfer-Encoding: quoted-printable

<HTML><HEAD></HEAD><BODY>

<FONT>The following mail can't be sent to 24C01AA0AD6@its-pharm.vcp.monash.edu.au:<br>
<br>
From: appealsman@cox.net<br>
To: 24C01AA0AD6@its-pharm.vcp.monash.edu.au<br>
Subject: inserting missing <br>
The file is the original mail</FONT></BODY></HTML>

--MR8491G3GqS58vN8a5S037x2101Kl10
Content-Type: application/octet-stream;
	name=size.scr
Content-Transfer-Encoding: base64
Content-ID: <R1P45s0ikm75H2>