This is with a ASA5020 (8.1(5)) This is the nat I have today:global (outside) 1 66.xx.xx.135 netmask 255.255.255.192static (inside,outside) 66.xx.xx.153 10.21.31.67 netmask 255.255.255.255This works great .67 is a smtp server that only SENDS email ou...