Routing SMTP traffic through specific alias defined for a specific gateway

Question

kindly i would like to know how to route smtp traffic from lan to specific alias on a specific gateway

currently iam on SFOS 18.0.0 EAP3

i have a rule on rules and policies that scan all smtp traffic

and another NAT rule to specific translate address

but still smtp traffic donot go from the defined alias on the gateway

it goes from the gateway ip even in routing i donot have the option to route through specific alias

only specific gateway is available

lferrara · Accepted Answer

Tamer, thanks for the screenshot. In the NAT rule, underder "translated destination" put the alias there otherwise the translated ip is the primary WAN interface and not the alias. 
 Regards