If you have been using Yahoo Mail app on Windows 10 for some time now then you would have already begun receiving notifications within the app informing them that the app will cease to work on May 22nd which is just a week away from today.
The App is currently available in the Windows Store but users will not be able to download the app since the download option has been removed. The app has already stopped working ahead of the cut off date as has been reported by lot of users on Twitter.
However Yahoo Mail users will still be able to login to their accounts on Windows 10 devices via a web browser or they also have an option to link their account to another mail app.