How to Open Yahoo Mail When You Have Error 999


Yahoo! is a popular search engine and Web portal that offers many free services, such as instant messaging, social media and email. Occasionally you may receive an "Error 999" message when attempting to login to your Yahoo! email account. This is often due to exceeding a bandwidth limitation to Yahoo!'s server. Although this error will automatically resolve itself within 12 to 24 hours, and allow you access Yahoo! mail like normal, you may need to check your email immediately.

  • Disconnect your cable or DSL modem from the wall outlet. Leave the unit disconnected for approximately 5 min. Reconnect both devices and attempt to access Yahoo! mail again. Disconnecting the modem and router sometimes assigns a new IP address to your internet connection, overriding the 999 error.

  • Attempt to access Yahoo! mail using a different browser. If you get the 999 error in Internet Explorer for example, attempt to connect to Yahoo! mail using Firefox or Google Chrome.

  • Connect to Yahoo! mail through the Yahoo! mobile portal. Open your browser and visit Click the "Mail" icon in the upper right corner of the page, and enter your Yahoo! ID and account password into the available fields. Click "Sign In" to view your email. Note that the mobile Yahoo! mail site has less usability than the normal Yahoo! mail portal.

  • Connect to Yahoo! mail through a proxy server. A proxy server masks your IP address from any websites you visit. There are many free online proxy server services available, such as, or To use online proxy server websites you must simply visit the proxy website, then enter "" into the proxy address bar on the site.

Tips & Warnings

  • Disable any programs or utilities that automatically access Yahoo!'s network frequently.

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