Gmail has the absolutely best spam filters period. I have used my Gmail acct as my primary email since it first out.
I can count on the fingers of my hands the times I have ever gotten spam in my inbox. They all get caught in the spam folder and auto-delete in thirty days so I don’t have to deal with them at all.
And this is without my monkeying around adjusting settings at all. I have almost forgotten what a headache spam was. Everytime I come across folks who complain about how much time they have to waste deleting spam, I wonder why they don’t just make life easier for themselves and open a Gmail acct.