Sign in to your Yahoo Mail account
Click the Settings gear icon
Select More Settings
Look for the option to switch back to the basic or older version
If available, choose Switch to basic Mail or Use the old version
Confirm the change when prompted
Refresh the page if the old version does not load immediately
Clear your browser cache and cookies if the option is not visible
Try using a different browser if the switch option still does not appear
Check whether Yahoo has removed support for the old version in your account
Use Yahoo Mail Help if the old version is no longer available