I don't see anywhere in the header that this email came through the 
GNAT Box SMTP proxy.  Normally you'd have a line like:

      Received: from night.xig.com (207.247.80.135) by XXXXX (3.2.1).

Where XXXXX is the name of the GB firewall and (3.2.1) is the version 
of the firewall/smtp proxy.

Paul

>
>Hi group,
>
>      I'm using gnatbox e-mail proxy on v3 Gnatbox Pro.  The proxy forwards
>mail from the Internet to an internal sendmail mail hub.  I have seen a
>lot of spam come and go, but one caught my eye (see below).  It is missing
>a 'To' header.  Is this valid?  How can it come through?  Also note that
>the 'Return-Path' header is empty.
>
>Thanks for your help!
>
>Alex Baram
>
>
>---------- Forwarded message ----------
>Return-Path: <>
>Received: from cogito.cam.org (FW2.XiG.COM [207.247.80.135])
>       by xig.com (8.9.3/8.9.3) with SMTP id KAA34683
>       for <[EMAIL PROTECTED]>; Mon, 27 Aug 2001 10:58:27 -0600 (MDT)
>       (envelope-from )
>Received: from cogito.cam.org (198.168.100.2) by FW2.XiG.COM (3.0.0).
>Received: from ecopdc (dialup-209-139-205-205.hip.cam.org [205.205.139.209])
>       by cogito.cam.org (8.11.0/8.11.0.Beta1) with SMTP id f7RGw7h26600
>       for <[EMAIL PROTECTED]>; Mon, 27 Aug 2001 12:58:08 -0400
>Date: Mon, 27 Aug 2001 12:58:08 -0400
>Message-Id: <[EMAIL PROTECTED]>
>From: Hahaha <[EMAIL PROTECTED]>
>Subject: Blanche neige et ...les sexe nains
>MIME-Version: 1.0
>Content-Type: multipart/mixed; boundary="--VEHM3S1QZ4TAB4TQVCP6Z4HAJ856NGL"
>
>
>----------------------------------------------
>To Unsubscribe: send mail to [EMAIL PROTECTED]
>with "unsubscribe gb-users your_email_address
>in the body of the message


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Paul Emerson                         Tel: +1.407.380.0220 x1106
Global Technology Associates, Inc.   Fax: +1.407.380.6080
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