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Understanding Normal EMail Headers

If you have EMail addresses that are forwarded to you, this is an example of a normal EMail message arriving after being forwarded.

Example EMail

Received: from Valid Relay Address Withheld by Your POP/SMTP Server's Address
 with ESMTP (Eudora Internet Mail Server 1.2); Fri, 23 Jan 1998 13:09:52 -0500
Received: from wabwall2.wabco-rail.com ([206.181.77.194])
          by Valid Relay Address Withheld (2.0 Build 2119 (Berkeley 8.8.4)/8.8.4) with SMTP
	  id NAA26418 for Valid Relay Address Withheld; Fri, 23 Jan 1998 13:14:40 -0500
Received: from darth.pei.wabco-rail.com by wabwall2.wabco-rail.com
          via smtpd (for Valid Relay Address Withheld with SMTP; 23 Jan 1998 18:09:41 UT
Received: from PEIW95RMS.pei.wabco-rail.com ([172.20.12.131])
          by darth.pei.wabco-rail.com (post.office MTA v2.0 0813
          ID# 119-30594U510) with ESMTP id AAA345
          for Valid EMail Address Withheld;
          Fri, 23 Jan 1998 13:09:39 -0500
From: Valid EMail Address Withheld
To: Valid EMail Address Withheld
Subject: lodges and guides
Date: Fri, 23 Jan 1998 13:09:40 -0500
X-MSMail-Priority: Normal
X-Priority: 3
X-Mailer: Microsoft Internet Mail 4.70.1161
MIME-Version: 1.0
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Message-ID: <19980123180939918.AAA345@PEIW95RMS.pei.wabco-rail.com>

Explaination

The routing headers define the routing of the EMail message from Post Office to Post Office. If you look at the IP Addresses, you can see how the mesage travelled through the net. Other information is also provided message headers that provide information about the location of sender.

In this case, you can see that a dial-in account on wabco-rail.com (PEIW95RMS.pei.wabco-rail.com ([172.20.12.131])) sent mail through various Mail Servers and then on to your Post Office. Notice that the way a dial-up is described here is different than that of ibm.net or pobox.com. Also, notice Message-ID contains the sender's domain, wabco-rail.com.

Additionally, From contains sender's domain and address.


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