Ask HN: Fastmail alternative with better spam filtering?

Office365 and outlook are great. The outlook app on iOS is solid, and the web app works seamlessly as well.

The spam filter works well on a decade old domain that get about 200+ spams a day.

I'm looking into switching to Fastmail. Is the spam filtering so bad? From what I could understand you can train it?

Zoho Mail is an alternative, though I can't speak much to their spam filtering.