I am also looking into how to selfhost my email (and yes I know, the horror of inboxing from self hosting. But I am at the point of not only willing to give it a tr, but actively saying "fuck you" to everybody that does not receive my email, because they are on Outlook or O365 (or Google, bt inboxing into Google is easier imho).

Especially with my paid Google now daily having spam in my inbox, while valid emails are so often in spam, that I have to check spam at least once per week.