I think someone has accessed my Yahoo account Here are some signs that someone else may be using your account Your Yahoo Mail account has been sending spam There are emails in your Sent folder that you didnt' send You send messages but aren't getting any replies Your account log shows strange login activity Account information has been deleted or changed without your approval If you see any of these symptoms, change your password!! Start from the Yahoo home page Click your name Or start from another Yahoo page Click the gear icon Select Account Info You may be asked to re-enter your password If so, type your current password and click Sign In Now you can see your account information Click Account security Click Change password Enter your new password Your new password must be between 8 and 32 characters long It cannot be a single character repeated and cannot contain your name or your Yahoo ID It cannot be the same as or similar to a password you've used before Don't use the same password that you use on another site! Enter your new password again to confirm it Secure your account Verify your account recovery information Is this information correct for your account?? Yes? Then no problem! No? You need to fix it! Be sure there's at least one mobile device associated with your account so we can send you a text message if you need help Add valid numbers Delete any incorrect or obsolete numbers Also be sure that your alternate email information is correct These should be non-Yahoo addresses where you can receive email in case you can't access your Yahoo Mail account Add valid addresses Delete any invalid email addresses Keep your account secure in the future Update your password and account information frequently Consider enabling on-demand passwords