Microsoft is testing Outlook Premium subscription for $3.99 per month

Microsoft is testing a new service called Outlook Premium. Currently, you can only get it if you receive an invite (if you want one, you can request it here).Outlook Premium gives you five personalized email addresses (using a custom domain of your choosing), an ad-free inbox, and improved calendar sharing. For those who have invites, it's free for the first year. Following that, Outlook Premium