[Gnus] `From' according to `Envelope-to'.

[Michael Cadilhac]

  As I've multiple  aliases for the same mailbox,  I receive mail sent
  to different addresses (mentioned in the `envelope-to' field of the
  received messages).

  In order to not  disturb the sender, I want - when  replying - to be
  warned like :

  ``Your default "from"  field is `michael.cadilhac@lrde.org', but the
  sender used `mc@lrde.epita.fr'. Change ?''

  I've been searching in the gnus sources for a while now, and I don't
  see  hooks   or  customization  rightly  situated   to  compare  the
  `envelope-to' field  of the original  message, and the  `from' field
  used (according to gnus-posting-styles). Have I missed something ?

  Thanks.

-- 
    Michael Cadilhac, a.k.a. Micha [mika] |
                    Epita/LRDE promo 2007 |  Please note that you should
  2 rue de la Convention | 08.70.65.13.14 |  s/-@t-/@/ my mail address.
94270 Le Kremlin Bicetre | 06.23.20.31.30 |