> ## Documentation Index
> Fetch the complete documentation index at: https://kb.mochahost.com/llms.txt
> Use this file to discover all available pages before exploring further.

# How do I view e-mail headers in Mail for Mac OS X?

1. Open Mail.

2. From the Mail menu, select **Preferences**.

3. Click the Viewing icon.

4. Click the **arrow box** on the Show header detail pop-up list and choose **All**.

5. Close the **Viewing window**. The e-mail headers should now be displayed in the message.

If you intend to send these headers to another person for review, then **double-click the message**.

6. Click the **Forward** button.

7. Finally, fill in the **To** field and send the message.