How to view the full headers of an email

IT staff may sometimes request the "full headers" of an email which contain additional delivery information. These headers are not the ones you normally see, but can help us diagnose delivery problems such as slow delivery or delivery into Junk Mail. They can also help block unwanted mail and phishing messages.

The instructions below explain how to view or send the full headers of an email using Outlook on your desktop or Outlook on the web (OWA),  Apple Mail (also known as Macmail), Mozilla Thunderbird and Gmail.

OUTLOOK

VIEW FULL HEADERS

  1. Double click on the email to open it in its own window
  2. In the email window, select File > Properties
  3. View or copy the full header information from the Internet headers section

TO SEND FULL HEADERS TO IT SUPPORT

  1. Start writing your IT support email
  2. If the email did not automatically open in its own window, select Pop out
  3. Locate the email whose headers you want to send, then drag it into the email you are writing
  4. The original email will be attached to your email with full headers
  5. Complete and send your email
OUTLOOK ON THE WEB

VIEW FULL HEADERS

  1. Access the email in your web browser
  2. In the message area, click on the three dots in the top-right section
  3. Select View View message details
  4. View or copy the full header information displayed

TO SEND FULL HEADERS TO IT SUPPORT

  1. Start writing your IT support email
  2. Click the Open in new window icon in the top-right of the message area to open your email in its own window
  3. Locate the email whose headers you want to send, then drag it into the email you are writing
  4. The original email will be attached to your email with full headers
  5. Complete and send your email
APPLE MAIL

VIEW FULL HEADERS

    1. From the toolbar, select the View button > Message > Long Headers
    2. View or copy the full header information displayed
    3. Double click on the email to open it
    THUNDERBIRD

    VIEW FULL HEADERS

    1. Double click on the email to open it
    2. From the toolbar, select the View button > Message Source
    3. View or copy the full header information displayed

    TO SEND FULL HEADERS TO IT SUPPORT

    1. Start writing your IT support email
    2. Locate the email whose headers you want to send, then drag it into the To or Subject section of the email you are writing
    3. The original email will be attached to your email with full headers
    4. Complete and send your email
    GMAIL

    VIEW FULL HEADERS

    1. Access the email in your web browser
    2. In the message area, click on the three dots in the top-right section
    3. Select Show original
    4. View or copy the full header information displayed

    TO SEND FULL HEADERS TO IT SUPPORT

    1. Start writing your email to IT support
    2. If replying to an email, select the Pop out reply icon on the right side of the message area to open your reply in its own window
    3. Locate the email whose headers you want to send, then drag it into the email you are writing
    4. The original email will be attached to your email with full headers
    5. Complete and send your email

    There is more information from Google about tracing an email with its full headers.

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