The following commands can be used while you are preparing a mail message in send mode.
To ... Do this
cancel the mail message ~x preview the mail message ~p add users to the Cc: list ~c users add users to the Bcc: list ~b users display this list of commands ~? use the visual editor on your mail message ~v insert a file into the mail message ~r filename add your signature ~a or ~A add users to the To: list ~t users run a shell command ~! command include output from a shell command ~<! command