PXylem

NEW DELHI,INDIA

In my earlier post "what is the DNA of your Google mail"
You come to know how to find out the Header. And this post is the continuation of previous one.

This post would make to read and understand better your Google mail and Yahoo mail.

In the Header of the Google mail. You will find something like this.

Delivered-To: MrRakesh@gmail.com

The email address the message will be delivered to.

Received: by 10.36.81.3 with SMTP id e3cs239nzb;
Tue, 29 Mar 2005 15:11:47 -0800 (PST)

The time the message reached Gmail's servers.

Return-Path:

The address from which the message was sent.

Received: from mail.emailprovider.com
(mail.emailprovider.com [111.111.11.111])
by mx.gmail.com with SMTP id h19si826631rnb.2005.03.29.15.11.46;
Tue, 29 Mar 2005 15:11:47 -0800 (PST)

The message was received from mail.emailprovider.com, by a Gmail server on March 29, 2005 at approximately 3 pm.

Message-ID: 20050329231145.62086.mail@mail.emailprovider.com

A unique number assigned by mail.emailprovider.com to identify the message.

Received: from [11.11.111.111] by mail.emailprovider.com via HTTP;
Tue, 29 Mar 2005 15:11:45 PST

Mr. Jones used an email composition program to write the message, and it was then received by the email servers of mail.emailprovider.com.

Date: Tue, 29 Mar 2005 15:11:45 -0800 (PST)
From: Mr Jones
Subject: Hello
To: Mr Rakesh

The date, sender, subject, and destination -- Mr. Jones entered this information (except for the date) when he composed the email.

And for IP, look for Received:from followed by the IP within square brackets [ ] e.g.

Received: from [11.11.111.111] by mail.emailprovider.com via HTTP; Tue, 12

Also importantly, there are times when you might find multiple Received: from entries, in that case, please select the last one as the valid choice.

Yahoo Mail...

To view a full header, click Full Headers in the lower-right corner of the page. A new window opens with the same message, but now also shows all the header information for that message at the top. See it? It’s got tons of computer gobbledygook, but it also has some information you can use.

You should be able to find a line that contains an 8 to 12 digit number, separated by periods. It might look something like this:

Received: from [123.456.78.91] by...

The "123.456.78.91" represents the unique IP address of the sender's ISP. Once you identify the IP address, you can run a "whois" search to determine which ISP provides this person with Internet access. If there’s more than one Received: line, read them from top to bottom (the topmost is the most recent.)

There are several utilities available on the web to run a whois search. Here's one web site that can help you to determine which service provider is responsible for the IP address.