Temporary Error 15
Occasionally, an issue may occur in Yahoo Mail resulting in "Temporary Error 15." Don’t worry, this error will usually correct itself within a few minutes to a few hours.
In the meantime, try this workaround
- Make sure you’re using a supported web browser and operating system (OS).
- 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.