Connection to the Server failed
Enjoy our service when it's convenient to you within the app you are familiar with and like. The Yahoo Mail account is compatible with a variety of third party email apps, like Thunderbird, Outlook, iOS mail app, Android mail app and more.
The error Connection to the Server Failed it means there might be a communication problem between the third party email app and your Yahoo account and it could be due to a few different factors.
The error message Connection to the server failed appears when: