We have a PIX515E on software 8.0(4). We are in the process of upgrading our mail gateway and I need to modify our NAT statement to facilitate traffic. Here is the scenario: The mail gateway has an inbound and outbound interface on the same private subnet. Incoming mail-flow will translate from <public address A>:25 to <incoming gateway interface 1>:25. Outgoing mail-flow will translate from <outgoing gateway interface 2>:25 to <public address A>:25. Is it possible to create a Dynamic Policy NAT rule to establish communication? Thanks.