Manual NAT rule with service translation, not translating service

[Sam_Ponder]

Hi All,

I'm having some troubles with using manual NAT rules to translate a service. I do have manual arp entries added and the merge arp enabled.

From testing and from some packet captures, I can see that when traffic is destined for ms-mail2 it is natting to the correct IP, however the service isn't being translated from smtp(port 25) to smtp-alt(port 465).

This is my first venture down the manual NAT rules and I feel like I am missing something small.

Basically, wanting to do this. When port 25 traffic comes in on 66.66.66.1 it NATs to 10.10.10.11 and stays port 25, When port 25 traffic comes in on 66.66.66.2 it NATs to 10.10.10.11 and translates to port 465. 

Can someone please provide some guidance?

Thanks in advance!

Sam

Edit: to add more description