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
pass in proto udp from any to any port = 53 keep frags(strict)
pass in proto tcp from any to any port = 25 keep state(strict)
pass in proto tcp from any to any port = 25 keep state(loose)