>> No, the gateway is left blank on that interface. The private interfaces are >> just cabled together via a switch.
> Then Postfix should not make any attempt to deliver mail using the > private address since it doesn't have a network route to deliver the > mail through that interface anyways. > Rgds/DP I know that postfix CAN'T deliver outbound on a connection that doesn't reach the internet. Your choice of words "should not" leaves me to assume you are guessing because it ends up working anyways. However I'm wondering if it tries, fails, then tries again until it finds the public IP. Even with the end result being the same, I would still rather remove an inefficient behavior of trying and failing. But for easy of management if custom IP's in configs aren't needed I would prefer to not have to set it.
