Yahoo Customer Care does not offer a direct email address for support. If you sign in using
https://att.yahoo.com/ you have an AT&T Yahoo account and you must go through them in order to reset your password. If you sign in using
https://mail.yahoo.com then you have a Yahoo account.
AT&T Email password change or reset -
http://www.att.com/esupport/article.jsp?sid=KB413495&cv=804&ct=9000086&pv=1#fbid=3NJRuQVqMzg
To reset your Yahoo password you should go through the password helper first. This should be done from a laptop or a desktop. You can not reset account passwords from a mobile device. The videos contained in the following article shows you how to recover your user ID or password using a mobile phone number, an alternate email address, or by answering your security questions
https://help.yahoo.com/kb/yahoo-account/SLN2081.html?impressions=true
If you are unable to recover your password using the link above you can use the next link to fill out a form to get support by email. If you do not know what to put in one of the boxes, click on the grey circle with an "i" to see what is expected.
Start here -
https://io.help.yahoo.com/contact/index?page=home&locale=en_US
Click on "Yahoo Mail" and select the version you need help with.
Under Topic select "Password and sign in"
Under Subtopic select "Change password"
Under Recommended Options you will see the support options available.
One option is to click on the "Email" option.
This opens a fill-in form that you will need to complete.
Submit this form by clicking on the "Create request" button.
If you're able to recover your account here's some guidelines for creating a secure, strong password -
https://help.yahoo.com/kb/mail/SLN3012.html?impressions=true
You should also edit your account information and update your mobile number and alternate email address.
Editing your Yahoo! Account Information -
https://help.yahoo.com/kb/mail/SLN2717.html?impressions=true
Add an alternate email address or mobile number -
https://help.yahoo.com/kb/yahoo-account/add-alternate-email-address-mobile-number-sln2058.html
Verifying alternate email addresses or mobile numbers -
https://help.yahoo.com/kb/mail/SLN3544.html?impressions=true
Once you're able to change your password it would be a good idea to review your security questions and make changes if you don't remember your answers.
Changing your security questions -
https://help.yahoo.com/kb/mail/SLN2031.html?impressions=true
You can also use a password manager like KeePass or LastPass to create and store strong unique passwords for the sites you visit. These programs can also save notes like your secret questions and answers to the password entries. LastPass can automatically log you in to any web site you have stored in its database.
