efaq: Saving a copy of outgoing mail

 
 11.2 How do I save a copy of outgoing mail?
 ===========================================
 
 You can either mail yourself a copy by including a ‘BCC’ header in the
 mail message, or store a copy of the message directly to a file by
 including an ‘FCC’ header.
 
    If you use standard mail, you can automatically create a ‘BCC’ to
 yourself by putting
 
      (setq mail-self-blind t)
 
 in your ‘.emacs’ file.  You can automatically include an ‘FCC’ field by
 putting something like the following in your ‘.emacs’ file:
 
      (setq mail-archive-file-name (expand-file-name "~/outgoing"))
 
    The output file will be in Unix mail format.
 
    If you use ‘mh-e’, add an ‘FCC’ or ‘BCC’ field to your components
 file.
 
    It does not work to put ‘set record filename’ in the ‘.mailrc’ file.