Add or remove account recovery methods

Do not lock your Yahoo account. Keep your mobile number or email address in case you lose your password. You can add or replace up to 10 email addresses. This limit includes the current email and any recently deleted items.
       . Some great tips in Yahoo! Mail
       . Turn on 2-Step Verification for Yahoo! Mail
       . Yahoo + AOL = Oath
Edit the restore information on a web browser
Go to the Yahoo Account security page.
Click Email Address or Phone Number.
Click Add a recovery email address or Add a recovery phone number.
Follow the on-screen prompts to enter and verify your new information.
Delete recovery options - Use steps 1 through 3, then click the Delete icon Delete icon with unwanted contact.