I guess it defeats the point of self hosting. But a common theme is that email self hosting is extremely difficult. Many things to take into account. I’d say go for it and maybe you’ll learn a lot in the process. But if you give up on self hosting it, but still want yiue own mail server on your own domain, then I’d say use infomaniak.

Infomaniak has pretty nice free email server options that you can link your domain to. They are a Switzerland based company which is known for having the best privacy laws around.

already wiped my account :D