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Headers
are produced by the mail servers and are added to the 'head' of an email when it
is sent. The header can be likened to an email's fingerprint i.e., it is unique
to that particular mail.
The header is always assembled from the bottom up, so when reading a mail
header, it is important to start at the bottom. That way, one can read each new
stage along the path because it is added to the top of the information already
present.
There are two main types of header, a POP mail header and a WEB mail header,
each looks different:
POP Mail Header:
Return-Path: <bpyev@caramail.com>
Received: from nis.co.kr ([211.171.8.2]) by mta4-svc.teco.net
(InterMail vM.4.01.02.27 201-229-119-110) with ESMTP
id <20010615084520.PZA25065.mta4-svc.teco.net@nis.co.kr>;
Fri, 15 Jun 2001 09:45:20 +0100
Received: from sendmail.ru (da001d2570.lax-ca.osd.concentric.net
[208.36.189.17])
by nis.co.kr (8.9.3/8.9.3) with SMTP id RAA07634;
Fri, 15 Jun 2001 17:41:56 +0900
From: bpyev@caramail.com
Message-ID: <00000d7e74de$00004b29$00005aa7@caramail.com>
To: <bpyev@caramail.com>
Subject: Increase Your Performance!
Date: Thu, 14 Jun 2001 23:19:52 -0700
X-Priority: 3
X-MSMail-Priority: Normal
Errors-To: comingbk@desertmail.com
X-Mailer: Pegasus Mail for Win32 (v3.11)
Web mail header:
Received: from M2W054.mail2web.com ([168.144.251.161]) by relay1.softcomca.com with Microsoft SMTPSVC(5.0.2195.5576);
Thu, 6 Feb 2003 06:36:58 -0500
Message-ID: <410-22003246113658310@M2W054.mail2web.com>
X-Priority: 3
Reply-To: test.test1@virgin.net
X-Originating-IP: 62.253.196.125
X-URL: http://mail2web.com/
From: "test.test1@virgin.net"
To: test.test1@virgin.net
Subject:
Date: Thu, 6 Feb 2003 06:36:58 -0500
MIME-Version: 1.0
Content-type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable
Return-Path: test.test1@virgin.net
X-OriginalArrivalTime: 06 Feb 2003 11:36:58.0335 (UTC) FILETIME=[0EB5C6F0:01C2CDD4]
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