An email header contains information about the email, including the sender and recipient, the route the email took to get to the recipient’s inbox, and other details. The OIT Service Desk or IT support staff may ask you to provide email header information in order to troubleshoot email delivery issues.
To view email header information, refer to the resource for your email application:
You can then copy the header information and provide it to IT support for investigation, if requested.
Note: IT support would like to know what headers you see. On mail in your Outlook sent folder, this may be none. Reporting "nothing" is useful for mail in this folder.