I've selfhosted my own email for almost a decade now. I was spending about 5 min a month on it until my ip block rep died one day for little decernable reason. Then I wasted many hours on it so I switched to sending through amazon ses and I'm back to my 5 min a month (updating packages/checking logs).

It has a few advantages because I can run a bunch of automations and filters. Honestly I get less spam than in my gmail inbox, so I harvest spam from gmail to train my filters now. It's insane to me how much providers charge for an inbox and the tiny sizes many still offer