The mail header is a hidden piece of code with your e-mails that carries information about that e-mail.
You can use the header to find out where an e-mail comes from or to solve problems when sending your own e-mails.
Outlook on a Windows computer? Use our manual for Outlook on Windows
Follow these steps in Outlook for Mac 2016/2011:
- Right-click on the e-mail whose header you want to view and choose “View Source” in the menu.
- The top part of the source is the mail header (see image).
