How to show Full Message Headers of an email in M365 OWA?

Full Mail Headers is the complete set of Email headers added by the sender's email software and related Email Servers during the email delivery process. It contains very useful information of the email message delivery and routing, including IP addresses involved, time sent and the sources of the email. For more detailed information please refer to here.

In Microsoft 365 Outlook Web App (OWA) you can show the full message header of an email with the following procedure:

  1. Login your M365 account at CityU Staff Sign in to Microsoft 365 web page.
  2. Select the email that you want to show its full message header. Click More actions icon.
  3. Select view message details.

  4. Right click mouse and click Select all.

  5. Select Copy to copy the highlighted content, then paste it to any editor (e.g. MS Word, Notepad, WordPad, etc).


Return to FAQs on CityU Microsoft 365