This is not improved, but ********.
Can you please advise what improvements you've made to Yahoo Mail? All I can see are neglected things, such as removing drag n drop of attachments, omitting keystrokes, and slow performance. Sigh!
Yahoo Mail is all about efficiency and performance. Enjoy a less cluttered interface, improved stability, and more responsiveness. Most features you know and love are present and we’re adding more as we go.
Please check this article for more info: https://help.yahoo.com/kb/SLN28078.html