How to review your account settings to ensure that your account is functioning properly following a possible compromise.

There are several ways your Yahoo! ID or Yahoo! account can be placed at risk. Here are a few:

Suspect someone else may have access to your account Believe your account was compromised ,Mail | Mail Classic

Should I close my account because it is sending spam? My account has been hacked .Mail | Mail Classic | Mobile Mail

This article provides steps for restoring a compromised Yahoo! account to its previous state:

At Yahoo! we take security very seriously and invest heavily in protective measures to ensure the security of our users and their data across all our products. We confirm that an older file from Yahoo! Contributor Network (previously Ass...

Learn more about protecting your account, see our help article about safeguarding your Yahoo! account . Learn more about common account risks, see our help article about h...

Adding a mobile number: This will alert you to any changes made to your account, such as a change in password. You can also recover your password via SMS text should you need it. This helps to keep you in...

We can't give you the exact time that your account was locked or when it will be unlocked. If you see an "Invalid Password" error message, see our help article about how to recover a lost password or go directly to our password...

If your mail servers are encountering persistent deferrals (i.e., 4xx SMTP error messages in your logs) when connecting to Yahoo! Mail servers, this may indicate that we are seeing unusual traffic or are getting considerable complaints regarding emails coming from your ...