message-header-format-alist

message-header-format-alist is a variable defined in `message.el'.
Its value is shown below.

Documentation:
Alist used for formatting headers.

Value:

((From) (Newsgroups) (To) (Cc) (Subject) (In-Reply-To) (Fcc) (Bcc) (Date) (Organization) (Distribution) (Lines) (Expires) (Message-ID) (References . message-shorten-references) (User-Agent))