Re: Reply-To -> CC?

[Pankaj Jangid <pankaj@codeisgreat.org>]

Eric Abrahamsen <eric@ericabrahamsen.net> writes:

>>> >> This is possible with ‘Posting Styles’. Something like this,
>>> >>
>>> >>              (message-to-A-p        ;; A function predicate 
>>> >>               (CC "B <b@cc.org>"))
>>> >
>>> > Does this also work when composing a new mail, or only when replying?
>>>
>>> Yes. It should work with all the messages.
>>
>> And Gnus modifies the header silently before sending?  Without
>> additional setup?
>
> I don't think so: posting styles only work when replying to a message in
> a particular group, or composing a new message "from" a group using "C-u
> m" or "C-u a" while point is on that particular group.

It works for a group if the fist element is a regexp. Quoting from the
doc:

--8<---------------cut here---------------start------------->8---
   The first element in each style is called the ‘match’.  If it’s a
string, then Gnus will try to regexp match it against the group name.
If it is the form ‘(header MATCH REGEXP)’, then Gnus will look in the
original article for a header whose name is MATCH and compare that
REGEXP.  MATCH and REGEXP are strings.  (The original article is the one
you are replying or following up to.  If you are not composing a reply
or a followup, then there is nothing to match against.)  If the ‘match’
is a function symbol, that function will be called with no arguments.
If it’s a variable symbol, then the variable will be referenced.  If
it’s a list, then that list will be ‘eval’ed.  In any case, if this
returns a non-‘nil’ value, then the style is said to “match”.
--8<---------------cut here---------------end--------------->8---

See “If the ‘match’ is a function symbol”.