I really have not persoanlly used Outlook 2007 much. But, I have done a lot of troubleshooting with it. I’m “meh” when it comes to the ribbon interface.
How to View Email Headers in Outlook 2007
1. Open Outlook 2007.
2. Open your email message.
3. Select the Message tab.
4. In the Options section, click on little box next to the word Options.
5. A dialog box will open.
6. At the bottom of the dialog box, the headers will be displayed in the Internet headers section.