
You don’t need Windows 10 Creator’s update, although that will update Mail too. Click your photo next to the search box at the top and select Downloads updates on the menu.

To check that it is up to date, open the Windows Store app.

In order to use this feature in the Mail app you must be running the latest update for the Mail app. Microsoft continues to improve the Mail app in Windows 10 and now there is an option to filter out all the boring emails you get every day so you can focus on the important ones.
