Viewing the header information differs from client to client. Below are instructions for some of the most commonly-used clients and ISPs. All of these instructions assume that:

  • Your email client is open.
  • You have a copy of the email.

Please note that these instructions were accurate at the time of publication (November, 2015) and minor changes may have been introduced in later mail client versions.

Important:

  • If you have deleted the email then you may need to restore it from the trash before you can view the headers.
  • If you forward the email it will affect the header, so you have to get the header from the original email you received.

Desktop Mail Clients

Apple Mail

Make sure the function to view headers is visible as follows:

  1. Open the email.
  2. Click View in the top menu.
  3. Click Customize Toolbars.
  4. Drag the Full Headers / Long Headers icon to your toolbar.
  5. Save the changes.

From the email you can now click Full Headers / Long Headers to display the content.

Microsoft Outlook 2013/2010
  1. Open the email.
  2. Click File.
  3. Click Properties.

The headers should be visible at the bottom of the window.

Microsoft Outlook 2007
  1. Open the email.
  2. Select the Message Tab.
  3. Go to Options.
  4. Click the Dialog Box Launcher.
  5. Click Properties.

The headers should be visible in the Internet Headers section.

Microsoft Outlook 2003/2002/2000
  1. Open the email in a new window (double-click it).
  2. Select the View menu.
  3. Click Options.

The headers should be visible in the Internet Headers section.

Mozilla Thunderbird
  1. Open the email in a new window (double-click it).
  2. Select View in the menu.
  3. Click Headers.
  4. Select All.

    The headers should now be visible.

Web Mail Clients

Gmail
  1. Open the email.
  2. Open the More menu using the down arrow next to the Reply symbol.
  3. Click Show Original.

You will now be shown the full headers in a new tab.

Microsoft Outlook (Hotmail)
  1. In the inbox, Right click the email.
  2. Click View Message Source.

The headers should now be visible in a new tab.

Yahoo!
  1. Open the email.
  2. Click Full Headers at the top.

The headers should now be visible.