How can I get my classic email back?
Once Yahoo upgrades to a new format.you can't get the old one back. They remove it from their server. Starting January 31st, 2019, the classic version of Yahoo Mail that you’re using on your computer will no longer be available. To ensure continued access to your Yahoo Mail account, you will be automatically upgraded to the latest version of Yahoo Mail or Basic Mail, depending on the compatibility of your computer’s web browser.
Yahoo Mail has 2 versions. 1. Basic Mail (heading shows sign out and home in the far top right) - This is a very limited version for slow internet connections and older computers and operating systems. You can switch to Regular Mail with the link in the upper right. 2. Regular Mail (heading shows your name, dots, and home in the far top right) - This is the full featured version. You can switch to Basic Mail with the link at the bottom of settings. Classic mail was removed on 1/31/19. You can not return to Classic.