Temporary Error 2
Occasionally, issues in Yahoo Mail can cause a temporary error. "Temporary Error 2," which can also appear as "MailboxOpenFailed," is one of these.
Don’t worry, this error will usually correct itself within a few minutes to a few hours.
Fix the error on your computer
- Sign out of Yahoo Mail on all desktop and mobile devices.
- Make sure you’re using a supported Web browser and operating system (OS).
- Learn what's supported by Yahoo Mail.
- Clear your Web browser's cache.
- Restart your browser.
- Sign back in to Yahoo Mail to see if the error is gone.