JPNerd sniped myself by trying to use PostfixAdmin from @mwl Run Your Own Mail Server, but the version in Ubuntu is from ages ago and the debian packaging mechanism seems to have been unmaintained for a number of years so I forked the upstream and hacked it to minimally work on my machine.
DrScripttWhat are you doing that has you running multiple instances of Postfix?
I think I’ve only ever run multiple MTAs on one system once or twice in the last 25 years.
And that was to deal with some very special MSA to MTA situation.
Otherwise I’ve always been able to use a single MTA.
@drscriptt It'll help me to reason about the way mail flows through the border gateway, various spam filters and the mailhub system. I'm using a few all-in-one instances now (different network segments, different virtual orgs) and sometimes it's confusing how it all fits together.
@daedalus fair enough.
Using multiple simpler configurations verses one more complex configuration is something that I’ve done multiple times.
I currently have multiple routers with two interfaces; inside and outside vs three or more interfaces; out0, out1, lan0, lan1, lan2, for the very reason you’re talking about multiple MTAs.
Have you considered multiple systems, each with one MTA? Taking the reason you’re describing to the next logical level.
I’m just talking hypothetical and trying to learn from your efforts.
Thank you for explaining. 🙂
@drscriptt yeah, I currently have multiple systems, each with an MTA. Trying to consolidate a couple of them.