On Tue, 2 Aug 2022 at 00:04, <post...@ptld.com> wrote: > > >> 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.
Correct its an inference. Maybe the Writers/Contributors of Postfix can confirm with authority. Rgds/DP
