Additions:
====Nota:====
El MTA contiene milters o spam etc que si alteran los headers, se te olvido anotar tambien que los spammers suelen agregar lineas received o "X-Spam-etc" para confundir.
Enlaces relacionados:
Anatomy of an Email Message
http://www.bath.ac.uk/bucs/email/anatomy.shtml
Reading and Understanding Email Headers
http://www.by-users.co.uk/faqs/email/headers
Reading Email Headers
http://www.stopspam.org/email/headers.html
----
El MTA contiene milters o spam etc que si alteran los headers, se te olvido anotar tambien que los spammers suelen agregar lineas received o "X-Spam-etc" para confundir.
Enlaces relacionados:
Anatomy of an Email Message
http://www.bath.ac.uk/bucs/email/anatomy.shtml
Reading and Understanding Email Headers
http://www.by-users.co.uk/faqs/email/headers
Reading Email Headers
http://www.stopspam.org/email/headers.html
----
Deletions:
Additions:
Return-Path: <test@gmail.com>
Received: from beta.guegue.com.ni ([unix socket])
by beta.guegue.com.ni (Cyrus v2.2.12-Invoca-RPM-2.2.12-8.1.RHEL4) with LMTPA;
Fri, 23 Nov 2007 22:08:50 -0600
X-Sieve: CMU Sieve 2.2
Received-SPF: pass (beta.guegue.com.ni: domain of test@gmail.com designates 72.14.214.239 as permitted sender) receiver=beta.guegue.com.ni; client-ip=72.14.214.239; helo=hu-out-0506.google.com; envelope-from=test@gmail.com; x-software=spfmilter 0.97 http://www.acme.com/software/spfmilter/ with libspf2-1.0.0;
Received: from hu-out-0506.google.com (hu-out-0506.google.com [72.14.214.239])
by beta.guegue.com.ni (8.13.1/8.13.1) with ESMTP id lAO48msU028560
for <test@guegue.net>; Fri, 23 Nov 2007 22:08:49 -0600
Authentication-Results: beta.guegue.com.ni from=test@gmail.com; domainkeys=pass
Received: by hu-out-0506.google.com with SMTP id 40so1238hub
for <test@guegue.net>; Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Received: by 10.78.140.17 with SMTP id n17mr20635hud.1195877328358;
Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Received: by 10.78.165.17 with HTTP; Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Message-ID: <83b0f4160711232008u27ee9906k2efcc9329c65ecea@mail.gmail.com>
Date: Fri, 23 Nov 2007 22:08:48 -0600
From: "Documentacion" <test@gmail.com>
To: "Test" <test@guegue.net>
Subject: Documentacion tecnica
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Greylist: Delayed for 00:15:29 by milter-greylist-3.0 (beta.guegue.com.ni [70.84.127.52]); Fri, 23 Nov 2007 22:08:49 -0600 (CST)
X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,CONTRA_GUEGUENET
autolearn=no version=3.2.3
Received: from beta.guegue.com.ni ([unix socket])
by beta.guegue.com.ni (Cyrus v2.2.12-Invoca-RPM-2.2.12-8.1.RHEL4) with LMTPA;
Fri, 23 Nov 2007 22:08:50 -0600
X-Sieve: CMU Sieve 2.2
Received-SPF: pass (beta.guegue.com.ni: domain of test@gmail.com designates 72.14.214.239 as permitted sender) receiver=beta.guegue.com.ni; client-ip=72.14.214.239; helo=hu-out-0506.google.com; envelope-from=test@gmail.com; x-software=spfmilter 0.97 http://www.acme.com/software/spfmilter/ with libspf2-1.0.0;
Received: from hu-out-0506.google.com (hu-out-0506.google.com [72.14.214.239])
by beta.guegue.com.ni (8.13.1/8.13.1) with ESMTP id lAO48msU028560
for <test@guegue.net>; Fri, 23 Nov 2007 22:08:49 -0600
Authentication-Results: beta.guegue.com.ni from=test@gmail.com; domainkeys=pass
Received: by hu-out-0506.google.com with SMTP id 40so1238hub
for <test@guegue.net>; Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Received: by 10.78.140.17 with SMTP id n17mr20635hud.1195877328358;
Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Received: by 10.78.165.17 with HTTP; Fri, 23 Nov 2007 20:08:48 -0800 (PST)
Message-ID: <83b0f4160711232008u27ee9906k2efcc9329c65ecea@mail.gmail.com>
Date: Fri, 23 Nov 2007 22:08:48 -0600
From: "Documentacion" <test@gmail.com>
To: "Test" <test@guegue.net>
Subject: Documentacion tecnica
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
X-Greylist: Delayed for 00:15:29 by milter-greylist-3.0 (beta.guegue.com.ni [70.84.127.52]); Fri, 23 Nov 2007 22:08:49 -0600 (CST)
X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,CONTRA_GUEGUENET
autolearn=no version=3.2.3
Deletions:
Received-SPF: none (beta.guegue.com.ni: mailer_daemon@barracuda.emi-tpa.com does not
designate permitted sender hosts) receiver=beta.guegue.com.ni;
client-ip=63.144.197.232; helo=barracuda.emi-tpa.com; envelope-from=;
x-software=spfmilter 0.97 http://www.acme.com/software/spfmilter/ with
libspf2-1.0.0;
Received: from barracuda.emi-tpa.com (mail.emi-tpa.com [63.144.197.232])
by beta.guegue.com.ni (8.13.1/8.13.1) with ESMTP id lAMGj88o024915
for <poo@alameda.com.ni>; Thu, 22 Nov 2007 10:45:09 -0600
From: Barracuda Spam Firewall <postmaster@emi-tpa.com>
Message-Id: <20071122162001.6CC101B19A@barracuda.emi-tpa.com>
Subject: **Message you sent blocked by our bulk email filter**
Content-Type: multipart/report; report-type=delivery-status;
charset=utf-8;
boundary="----------=_1195748403-9871-11"
To: <poo@alameda.com.ni>
Date: Thu, 22 Nov 2007 11:20:03 -0500 (EST)
X-Greylist: Delayed for 00:25:05 by milter-greylist-3.0 (beta.guegue.com.ni
[70.84.127.52]); Thu, 22 Nov 2007 10:45:09 -0600 (CST)
X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_50 autolearn=ham
version=3.2.3
Additions:
En general, el software de transporte de correo no revisa ni altera los encabezados del correo, a excepción de el header "Received:".
**Received:** Pueden aparecer varios en el encabezado, sin embargo, el último de la lista es el servidor del remitente y el primero corresponde al remitente. Cada sistema de correo, por donde pase el mensaje, debe agregar, al comienzo de cada mensaje, el header "Received:". Estos headers pueden ser utilizados para hacer seguimiento a la ruta utilizada para que el mensaje llegue a su destino.
**Received:** Pueden aparecer varios en el encabezado, sin embargo, el último de la lista es el servidor del remitente y el primero corresponde al remitente. Cada sistema de correo, por donde pase el mensaje, debe agregar, al comienzo de cada mensaje, el header "Received:". Estos headers pueden ser utilizados para hacer seguimiento a la ruta utilizada para que el mensaje llegue a su destino.
