I have used this app to filter my Outlook mail for years and it works very well after a bit of teaching in the beginning.
https://www.cloudmarkdesktop.com/en/upgrade
Promo Code: DESKTOP4FREE
Well worth taking a look at – especially since right now its free… I assume they will change that as I happily pay the 19.95 a year for the hundreds of thousands of spam emails it has caught for me..
Here are the email programs it will interface with: