title.gettext Reserved to subscriber

equal([sender], 'sysadmin@group.mageia.org') smtp,smime,md5 -> do_it
match([sender], /@mageia\.org$/)     smtp,smime,md5    -> do_it
is_subscriber([listname],[sender])   smtp,smime,md5    -> do_it
true()                               smime,md5         -> do_it
true()                               smtp              -> reject(reason='send_subscriber')