May be worth having a look at the ActivityPub protocol. It’s the way Lemmy instances (and other stuff!) communicate with one another. From there I think it will be clearer how a single Lenny instance could behave. https://activitypub.rocks
I played around with smtp2go and it felt like what you’re after.
I know how you feel though. I self-hosted mail for about 5 years with a VPS running OpenBSD. Eventually I looked at “outsourcing” SMTP to get around this crazy IP reputation stuff. But eventually I went with a fully hosted service Migadu.
Exactly. I think about an email hosting service. What does downtime mean exactly? Is the service down when you can send but cannot receive mail? Or when the service receives mail but it can’t deliver it to your inbox? Nailing this down can be difficult, especially (in my experience) with the ones who decide where $$$ goes.
Thanks! Is there something about the larger area space which means there are fewer hops?