empty spam and headers

["Murda Mcloud" <murdamcloud () bigpond com>]

Hi all,
Have been seeing an increase in empty spam: ie no subject/body and
apparently no sender(but the header says otherwise).
This is in Outlook 2003.



Could the header be purposely malformed or something because otherwise I
can't quite see the point. Unless there is something in the body that is
unseen by the recipient.

Anyone else can shed some light on this?

Sample Header:

===============
Return-Path: <ivbpmzdq () yahoo com>
Received: from nschwingx01p.mx.bigpond.com ([58.248.73.185])
          by nschwmtas01p.mx.bigpond.com with ESMTP
          id
<20080915225821.IUTH2284.nschwmtas01p.mx.bigpond.com () nschwingx01p mx.bigpond
.com>;
          Mon, 15 Sep 2008 22:58:21 +0000
Received: from [61.9.189.122] (really [58.248.73.185])
          by nschwingx01p.mx.bigpond.com with SMTP
          id
<20080915225815.MTSK10919.nschwingx01p.mx.bigpond.com@[61.9.189.122]>;
          Mon, 15 Sep 2008 22:58:15 +0000
Received: from 21.140.224.172 by ; Tue, 16 Sep 2008 21:57:52 -0100
Message-ID:
<20080915225821.IUTH2284.nschwmtas01p.mx.bigpond.com () nschwingx01p mx.bigpond
.com>
Date: Mon, 15 Sep 2008 22:58:21 +0000
=====================