The more I read about hosting email for a self-hosted domain, the more it looks like a massive pile of complexity.
The websites that I’ve been reading are split, 50:50, on whether it is good to self-host email, or not. There seems to be no middle ground, it’s real Marmite territory.
I’m going to push ahead, but I’ll do it against this domain, not a busier one.
But one of the strongly-recommended pre-reqs to self-hosting email is to implement reverse DNS.
The battle for the ground of hosting email starts here, with reverse DNS.