Mail app for Windows 8.1 - How to empty a mail folder
In this article you will learn how to easily clear the content of your mail folders on the Mail app for Windows 8.1. Using this method you can manually purge your PC from junk or obsolete messages, thus reclaiming some storage space.
Open the Mail app.
Select the folder of your choice (e.g the Junk folder).
Right-click on an empty area of your screen > Manage folders > Empty folder.