"-tag to include "encrypt=pgpmime", or you can simply choose
"Encrypt part" from the "Attachments" menu.

I just tested against Thunderbird with Enigmail, and it just ignores the
encrypted attachment, so I guess it depends on the client how well it is
handled - MIME can be tricky (Gnus seems to handle it fine, though).


  Best regards,

    Adam

-- 
 "Fader eg må be om undskyldning                              Adam Sjøgren
  Det er min feil at Tony er pakkt in i presenning"      asjo@koldfront.dk