PAT in both directions

I need to do port address translation in both directions, so inbound and outbound SMTP use the same public IP. Address is so I do an SNAT for port 25 from to and things are happy that way. Then do I just do a NAT for to any external set the source to and put that rule ahead of NAT that sets the source to It seems to work, but is there a way to limit it to just port 25 and not all ports for the outbound?


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    You can remove the outgoing D.NAT config and just add an outgoing SMTP policy
    TO: Any-External
    and in Policy’s Advanced Setting configure there as the Source IP

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