After self-hosting my email for twenty-three years I have thrown in the towel. The oligopoly has won.
cfenollosa.com/blog/after-self-hosting-my-email-for-twenty-three-years-i-have-thrown-in-the-towel-the-oligopoly-has-won.htmlYou cannot set up a home email server.
You cannot set it up on a VPS.
You cannot set it up on your own datacenter.