Some kind of "all in one" where you have SQLite file with config (aliases/accounts etc) + maybe SQLite file per account for storage + some sane SMTP/IMAP config

Some kind of "all in one" where you have SQLite file with config (aliases/accounts etc) + maybe SQLite file per account for storage + some sane SMTP/IMAP config with DKIM and all the other crap spammers implement anyway but servers will spam you for if yu don't have it would be useful. I've recently did a small server for private use (after google yeeted the free tier) and let's say it does require a bit of mail knowledge to set it up right. That being said there is probably some container doing it, surely "easy mail selfhosting" isn't a new problem