Variable: message-send-news-function
message-send-news-function is a customizable variable defined in
message.el.gz.
Value
message-send-news
Documentation
Function to call to send the current buffer as news.
The headers should be delimited by a line whose contents match the
variable mail-header-separator.
Source Code
;; Defined in /usr/src/emacs/lisp/gnus/message.el.gz
(defcustom message-send-news-function #'message-send-news
"Function to call to send the current buffer as news.
The headers should be delimited by a line whose contents match the
variable `mail-header-separator'."
:group 'message-sending
:group 'message-news
:link '(custom-manual "(message)News Variables")
:type 'function)