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How to view the full headers of an email message

Overview

It is necessary to be able to view the full-header (see example) of an email message if you need to forward a spam message or other email that needs to be investigated. Viewing full-headers is also useful if you are interested in getting a more detailed look about where your message originated, but it is not a fool-proof method since email headers can be spoofed or faked.

Outlook 2003

You can display full headers by double clicking on a message so that it opens in a separate window (not the preview pane).

1. Choose the View pull down menu, then select Options.
   
   
   
   
2. The Internet headers are shown in the box at the bottom of the window.

Outlook 2007

You can display full headers by double clicking on a message so that it opens in a separate window (not the preview pane).

1. Click on the Message Options button.
   
   
   
   
2. The Internet headers will be displayed in a separate window:
   
   

Entourage

1. While in Entourage, open the email you want to view full headers on by double-clicking it so that it opens in a new window.
2. Click View on the Entourage menu bar at the top of the screen.
3. Select Internet Headers.
4. The full headers are displayed above the message.
   
   

Eudora

Open the email by double clicking on the subject line. You can display full headers by clicking the icon with the text:
BLAH
BLAH
BLAH
(The icon is the 3^rd from the right in the image below. It’s to the right of the pencil)

 IMP (Web Mail)

If you use IMP click on ‘Message Source’ to view the full-headers

 Pine

If this feature is enabled, you simply press "H" to toggle full headers. If the feature is not enabled, you must enable it first:

• From the main menu, press (S)etup, (C)onfig. Scroll down about 40 lines to the option labeled "enable-full-header-cmd."

• Press [ENTER]. Press (E)xit, (Y)es - to save. Then you can return to the message window and use "H" to display the headers.

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 Other email clients

Spamcop.net has an extensive list of email clients with instructions on revealing full-headers.