On every iOS device, Yahoo Mail occasionally doesn't function. If Yahoo Mail hasn't been used for a while, this problem will arise. This problem will also be brought on by some unidentified iOS glitches. Incompatibilities should be a potential cause of this issue if you are running an outdated iOS system version. But there are some proven methods for fixing this issue.
Method 1: Force Restart Your iPhone
For iPhone 8 and newer devices, press and swiftly release the Volume Up button. Then rapidly release the Volume Down button after pressing it. Hold down the Power button until the Apple logo appears.
Method 2. Check Your Yahoo Mail Account
Please verify that your Yahoo Mail account is still operational if you are unable to send or receive mail using Yahoo Mail on your iPhone. You can test sending and receiving mail by logging into Yahoo Mail through a browser. If your Yahoo Mail account is disabled, try using a different Yahoo Mail account to solve the iPhone Yahoo Mail not working issue.
For More Please Contact to Manpreet Kaur Sandhu