[commandersaki]

I agree with that aspect of DR; I guess I was more thinking of availability, in that I can probably handle a few hours of not receiving emails, but if it goes longer than a day or so then I'd be pretty miffed. Like I said it's all doable, but it requires a lot of effort, and is probably best not left to someone running a one man show, and once you have more than one person you likely now have to deal with trust and expenses.

I've run a lot of other people's email, including my own vanity domains for decades. It really isn't rocket science.

Again, so have I, and as I said the happy path is always easy, it's when things go wrong, and I'm not even talking about IP reputation or any of the usual issues that people bring up running email.

Email is not a critical (its important) service

Really depends; I still have many services such as banking where I need to use auth codes, also a lot of security is tied to my email in terms of private comms and recovering services.

Suppose your email service went down and the people you run email for complain, do you tell them "oh don't worry it's not a critical service, you can still communicate over other mediums"? Would that work for say gmail?