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.

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