If you recently changed your password, you also updated your Yahoo! Mail account. Yahoo! Mail doesn’t know if you have a new password unless you enter it. Editing this information in your Yahoo! Mail account settings should correct the problem.
To do it:
- Click Options in the upper-right corner of your Mail page.
- Select More Options.
- Choose Account Information.
- Enter your password.
- Under "Sign-in Security", click Change your password.
- Enter your old password, and your new password.
- Click Save .
Note: If you update this setting and still have trouble, contact your Internet Service Provider or your work or school’s Network Administrator to see if too many password attempts tripped a switch that temporarily blocks your account.