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Updated on January 31, 2023

How to view email header on Mac OS Mail App

Mail inboxes would show who your message is from, and when it is delivered. But email headers can show you more specific information such as List-ID, or Resent-From information, which is not visible right away. Here’s how you can view email header fully when you have the Mac OS Mail app.

1. Look for the Mail app using the Spotlight search, or from your dock.

mac os mail app


2. Single-click on the email you want to view header from.

3. On the navigation bar, click on View.

mac os mail menu view


4. Select Message, then click All Headers.

mac os mail message all headers

  • A new window should give you the full header details of your selected email.


5. If you would like a more comprehensive view of the header again, click on View, then Message. And select Default Headers.

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