I always thought rejecting spam was bad because it gives information to the spammer. So I have always routed it to a crap folder. Good mail almost never goes

I always thought rejecting spam was bad because it gives information to the spammer. So I have always routed it to a crap folder. Good mail almost never goes there. Unfortunately I made some mistakes with wildcard addresses long ago that I'm still somewhat saddled with. In practice I'm using Fastmail for everything, but in theory self-hosting an IMAP server should be pretty easy. The main usefulness of hosted email services is deliverability for outgoing SMTP, with inbound spam filtering in 2nd place. So if you can separate those functions, you can do all your mail storage on your own IMAP server without suffering from much headache. I haven't tried to actually do this though.