Temporary Error 1
Occasionally, issues in Yahoo Mail can cause a temporary error. "Temporary Error 1," which can also appear as "UserOpenFailed," is one of these.
Don’t worry, this error will usually correct itself within a few minutes to a few hours.
In the meantime, we recommend these steps:
- Make sure you’re using a supported Web browser and operating system (OS).
- See our Yahoo Mail system requirements for more info.
- Sign out of Yahoo Mail on all desktop and mobile devices.
- Clear your web browser's cache and cookies.
- Restart your Web browser.
- Sign back in to Yahoo Mail to see if the error is gone.