You can view message headers in the message preview pane. In addition to sender and receiver information, headers provide message routing and transport information, such as the Message ID, Content Type, and MIME version.
to show the message From, To, CC, BCC, Date, and Subject information.
to hide the message From, To, CC, BCC, Date, and Subject information.
is selected to expand the message address and subject information, you can click the Show Header
/ Hide Header
arrow above the message From line to view or hide message header information. Click:
to show the detailed message header information.
Click to hide the detailed message header information.