Wide reply in Gnus

[Leo]

Hi there,

I read gmane news groups. When I want to reply to an article posted by
someone not subscribed, I want to write to him but also post to the
newsgroup. By default, 'S w' will generate in the mail buffer:

,----
| To: ***random@net.net>
| Cc: help-gnu-emacs@gnu.org
`----

I subscribe to the list through gmane so directly posting to the list
will fail. Does any one see this problem and what's your solution? I
know Gnus is extremely powerful, so maybe there is already a function
to do it. TIA.

-- 
Leo <sdl.web AT gmail.com>                         (GPG Key: 9283AA3F)