I also host my own email server. For the first several years, I didn't have a spam solution since I wasn't getting any. After it started coming (not in terrible

I also host my own email server. For the first several years, I didn't have a spam solution since I wasn't getting any. After it started coming (not in terrible amounts but enough to become a nuisance), I set up rspamd. It works nearly perfectly: all spam mail is correctly detected as such and legit email rarely ends up as junk (perhaps once in several months).