32.4.2 Mail Header Editing
Message mode provides the following special commands to move to particular header fields and to complete addresses in headers.
C-c C-f C-t
Move to the ‘ To’ header ( message-goto-to).
C-c C-f C-s
Move to the ‘ Subject’ header ( message-goto-subject).
C-c C-f C-c
Move to the ‘ CC’ header ( message-goto-cc).
C-c C-f C-b
Move to the ‘ BCC’ header ( message-goto-bcc).
C-c C-f C-r
Move to the ‘ Reply-To’ header ( message-goto-reply-to).
C-c C-f C-f
Move to the ‘ Mail-Followup-To’ header field
( message-goto-followup-to).
C-c C-f C-w
Add a new ‘ FCC’ header field, with file-name completion
( message-goto-fcc).
C-c C-b
Move to the start of the message body ( message-goto-body).
TAB
Complete a mailing address ( message-tab).
The commands to move point to particular header fields are all based
on the prefix C-c C-f (‘ C-f’ is for “field”). If the
field in question does not exist, the command creates one (the
exception is mail-fcc, which creates a new field each time).
The command C-c C-b ( message-goto-body) moves point to
just after the header separator line—that is, to the beginning of
the body.
While editing a header field that contains addresses, such as
‘ To:’, ‘ CC:’ and ‘ BCC:’, you can complete an address by
typing TAB ( message-tab). This attempts to insert the
full name corresponding to the address based on a couple of methods,
including EUDC, a library that recognizes a number of directory server
protocols (see EUDC in The Emacs Unified Directory
Client). Failing that, it attempts to expand the address as a mail
alias (see Mail Aliases). If point is on a header field that does
not take addresses, or if it is in the message body, then TAB
just inserts a tab character.