Your account can be suspended if one of Yahoo's products malfunctions. Yahoo is extremely picky about upholding the caliber of its goods and services. If your Yahoo account has been momentarily locked, you can immediately unlock it by using the Sign-in Helper. To understand how to unlock a Locked Yahoo Email account, use the Yahoo Help Forum Page. You must now click the notice that says "Account Locked." After that, click "Sign-in Helper" and enter your phone number or Yahoo Mail address. You will now either be prompted for security questions or given an "Account Key" via your recovery mail or phone. If you follow the instructions on-screen, you can unlock your restricted Yahoo Account immediately.