To restore any emails, you can check the Trash folder of your email account. There are most chances that the missing or deleted emails move into the Trash folder, so you can prioritize it to restore for any emails. Form there you can press Move, Restore, or any available options, it is also the same, if Yahoo mail down. After waiting for a few minutes, apply the same.https://www.contact-mailsupport.com/blog/yahoo-mail-down/