Trace email tool attempts to locate the source IP and lookup information for a given email header information.
1) Clear the text box below	2) copy your email header and click Trace email button.
An example to find the email headers in yahoo mail and gmail is presented here.

Trace Email Tool

Received-SPF: pass (mta1014.biz.mail.sk1.yahoo.com: domain of bounce@ientrynetwork.net designates 66.28.139.180 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws; q=dns; s=ientry; d=ientrynetwork.net;
 b=XiDuJFbpgymhSNRR2hp3RlvIRhp4JhkWe3NJofkAPB/dw+riouWbpeZHnxgGoutEUcdE4ByjBKbq
   4xXhwyJyBWYy9bq9BHjPjLZk6ykYvRjVXLapV2Vu2/lEbl8PywrMJNnu+YQAzHAxxgdyUo2AMOMC
   w5EYqdkgMABNV5zO9EQ=;
From: "WebProNews" <webpronews@ientrynetwork.net>
To: contact@ipmarker.com
Reply-To: <support@ientry.com>
Subject: Has SEO Peaked?
Message-ID: <cka.21101576.419991083.0.2w@ientrynetwork.net>
Mime-Version: 1.0
Content-Type: multipart/alternative; boundary=976f1dea8c1a540
Date: Thu, 10 Mar 2011 12:21:57 -0500
Content-Length: 32622
>

Locating the Email Header - An step by step example using Yahoo mail.

Step 1:
Login to your Yahoo mail using your favourite browser.

Step 2:
Open the mail you would like to trace from your Inbox.

Step 3:
Click On the Actions Button and click on view full headers.

Step 4:
Full Headers pop-up is now displayed.

Step 5:
Right Click on the pop-up and "Select All" and copy the Header information.

Step 5[GMAIL]:
If you are using gmail, open the email and right click on the down arrow at the top right corner as shown and click "show original".

Step 6:
Paste the header information obtained in the above step in the email lookup tool and click "Trace email".