title.gettext restricted to local domain

# if subscriber request come from local domain do_it else reject
is_editor([listname],[sender]) smtp,smime,md5    -> do_it
is_owner([listname],[sender])  smtp,smime,md5    -> do_it
match([sender],/[conf->host]$/)      smtp,smime,md5    -> do_it
true()				     smtp,smime,md5    -> reject(reason='send_local_user')
