View message headers in Outlook on your desktop.
- Double-click an email message to open it outside of the Reading Pane.
- Click File > Properties.
- Header information appears in the Internet headers box.
- Highlight the information in that box, press Ctrl+C to copy.
- To email this information simply paste it into the email content and send.
- To view the email header you can paste it to Notepad or Word to see the entire header at once.