1. Open your Outlook 2013 Client.
2. Within Outlook 2013, double-click on the email in question to open it in a new window.
3. Click on the File tab.
3. Click Info.
4. Click the Properties button.
5. The E-mail headers will be located in the Internet Headers box. To copy the header information, Right-click anywhere within and click "Select All", right-click again to select "Copy".