Troubleshoot the Yahoo mail down the issue at once:

Yahoo webmail service is being used in different parts of the world. The use of this platform is treated as the secure one and hence people prefer it mostly. But randomly they come across the problems like Yahoo mail down. At that time, what should be the solution tactics matters a lot for users? Therefore, they should be familiar with the strategies that may help them to have communication with the Yahoo support team.

https://www.contact-emailsupport.net/blog/is-yahoo-mail-down-today