message: Mail Headers

 
 3.2 Mail Headers
 ================
 
 ‘message-required-mail-headers’
      SeeNews Headers, for the syntax of this variable.  It is
      ‘(From Subject Date (optional . In-Reply-To) Message-ID (optional .
      User-Agent))’ by default.
 
 ‘message-ignored-mail-headers’
      Regexp of headers to be removed before mailing.  The default is
      ‘^[GF]cc:\\|^Resent-Fcc:\\|^Xref:\\|^X-Draft-From:\\|
      ^X-Gnus-Agent-Meta-Information:’.
 
 ‘message-default-mail-headers’
      This string is inserted at the end of the headers in all message
      buffers that are initialized as mail.
 
 ‘message-generate-hashcash’
      Variable that indicates whether ‘X-Hashcash’ headers should be
      computed for the message.  SeeHashcash (gnus)Hashcash.  If
      ‘opportunistic’, only generate the headers when it doesn’t lead to
      the user having to wait.