Message header

The part of an email that precedes the body or text of the message. A message’s full header includes detailed information about the mail servers and protocols used to route the message. Most email apps, including Mail, show an abbreviated version—typically, sender, recipients, date, and subject.

In Mail, you can move the pointer around the header area of messages you receive to make a sender a VIP, and reveal icons you can use to delete, answer, or forward a message, as well as manage attachments.

To add more items, such as Priority, to the header of an email, click .