Yahoo provides users with the ability to send and receive emails. Occasionally, though, you may get the notification Yahoo Mail Not Working. As a consequence, customers would be unavailable to access Frontier services. A slow internet connection might be causing the email not to operate problem. You may be using an unsupported or older browser to access email. A disagreement with third-party software might sometimes result in email difficulties. The existence of a virus on the system may result in the email failing to work properly.