Before switching to shared hosting from my VPS (one reason being that i didn't want to bother with email maintenance and didn't want to have a separate service just for email), i had my mail with (badly configured) Spamassassin that wouldn't delete mail, just add a "SPAM" prefix in the topic. My mail isn't exactly commonly known, but still is one i have for years and was made public thanks to me releasing an Android app once (after which, spam increased dramatically).

Even after running it for years, Spamassassin never marked a legitimate mail as spam, so i'm pretty sure that if i wasn't too lazy to configure it to move it to a spam folder, it'd work fine. Stuff did pass through it (at a ratio of one every four or so) but i was fine with deleting those.

What i'm trying to say is that from personal experience, i'd be fine with a spam filter that errs on the side of not marking stuff for spam and me deleting whatever goes through manually. Having to see a bit of spam mail is small cost for losing mail i'm actually interested in.