Self-hosted email is trusted? Not in my experience -- maybe I had bad luck and a small sample size but I quickly abandoned it after a few contacts I needed to be able to e-mail didn't get my email. And generally it didn't even go to their spam box -- it was filtered from even getting that far by their provider.

I was using a dedicated VPS, maybe that was part of the issue, maybe self-hosting from a residential IP might work better. But it was easier for me to let iCloud handle my domains email. It's been flawless ever since even though they're not really a big player in e-mail. Used Proton for a bit, that was (almost) flawless as well, though even Proton occasionally gets blocked by stricter corporate rules.