On Sep 24, 2010, at 14:49, Tony Lambiris wrote: > I have the plugin loaded: require_resolvable_fromhost and it never seems to > flag unresolvable "MAIL FROM" hosts:
Actually, it flags it but doesn't tell the client until RCPT TO. Some old MTAs will get confused when being rejected at MAIL FROM. (Maybe that's not so relevant anymore, but it used to). - ask
