155: How do I save a copy of outgoing mail?
  
  Two methods:
  
  1. (setq mail-self-blind t) will result in a `BCC:' header line with your
     address being added to mail composition buffers.  This will cause the
     mail system to send a copy of the mail back to you.
  
  2. (setq mail-archive-file-name (expand-file-name "~/outgoing")) will
     result in an `FCC:' header line with the pathname of ~/outgoing being
     added to mail composition buffers.  When you send the mail, Emacs will
     save a copy of the mail in the file ~/outgoing and then strip off the
     `FCC:' line before actually sending.
  
     WARNING: There is a bug in Emacs 18.58 that prevents mail readers such  +
     as RMAIL from reading the saved mail messages individually.  See        +
     question 157.                                                           +
  
     WARNING: If you are visiting the file ~/outgoing at the time you send
     the mail, this can cause a variety of horrible problems.
  
  It does not work to put `set record filename' in the .mailrc file.