Email message headers are very useful for diagnosing email delivery issues, each server an email passes through is listed and time stamped in the headers allowing you to trace the path of any email. Headers can also contain other useful information such as the message ID and whether the email has been filtered as spam.

For instructions on how to view you message headers click your email client:

Outlook office 365
Outlook 2010 to 2016
Outlook 2007
Windows Mail
Mac OS X Mail
Mozilla Thunderbird
Zimbra Webmail
Google Gmail
Yahoo Mail
Outlook.com
Squirrel Mail Webmail
RoundCube Webmail
Horde Webmail


Outlook office 365

  1. Open the email message you want to view the headers for and click file
  2. Select Info
  3. Click Properties
    outlook_info
  4. Your headers will be listed under Internet headers
    outlook_headers

Outlook 2010 to 2016

  1. Open the email message you want to view the headers for and click file
  2. Select the Info tab
  3. Click Properties
  4. Your headers will be listed under Internet headers
    outlook_headers

Outlook 2007

  1. Open the email message you want to view the headers for.
  2. Select the Message tab
  3. Locate Options (This is generally listed under the Follow Up/Mark as Unread icons)
    2007_options
  4. Your headers will be listed under Internet headers
    outlook_headers

Windows Mail

There is no option to view headers in windows mail, to gain access to the headers check your account to see if you have a webmail client and view you email through there instead, the most common webmail clients are covered in this article.


Mac OS X Mail

  1. Open your message
  2. Click View
  3. Select Messages > All Headers

Mozilla Thunderbird

  1. Select your message
  2. Click View from the toolbar
  3. Click Message Source to view your headers

Zimbra Webmail

  1. Right click on the message
  2. Select Show Original
    zimbra_show_headers

Google Gmail

  1. Click the arrow next to the reply button
  2. Select Show Original
    google_view_headers

Yahoo Mail

  1. Open the email
  2. Click More > View Raw Message 

Outlook.com

  1. Right click on the email
  2. Select View message source 

Squirrel Mail Webmail

  1. Open the email
  2. Select Options > View Full Header

RoundCube Webmail

  1. Double click the email
  2. Click the arrow to the right (Toggle raw message headers)
    round_cube_headers

Horde Webmail

  1. Open the email message
  2. Click Message Source