:type '(repeat sexp)) ; Fixme: improve this
(defcustom message-required-headers '((optional . References)
:type '(repeat sexp)) ; Fixme: improve this
(defcustom message-required-headers '((optional . References)
"*Headers to be generated or prompted for when sending a message.
Also see `message-required-news-headers' and
`message-required-mail-headers'."
"*Headers to be generated or prompted for when sending a message.
Also see `message-required-news-headers' and
`message-required-mail-headers'."