| pass in proto tcp from any to any port = 25 flags S/SA keep frags | |
| block in proto tcp from any to any port = 25 flags S/SA keep frags | |
| pass in proto udp from any to any port = 53 keep frags | |
| block in proto udp from any to any port = 53 keep frags | |
| pass in proto tcp from any to any port = 25 flags S/SA keep state keep frags | |
| block in proto tcp from any to any port = 25 flags S/SA keep state keep frags |