If you would like to change your Yahoo!Xtra password, just sign in to your Yahoo!Xtra account with your current password and click the Account Info or My Account link at the top of the page. You will be asked to re-enter your current password for verification. Then:
Your Yahoo!Xtra password will always apply to your entire Yahoo!Xtra account. This means that it will be valid not only for Yahoo!Xtra Mail, but also for Yahoo!Xtra Messenger, My Yahoo!Xtra, Yahoo!Xtra Finance, and all of Yahoo!Xtra's other personalized services.
Please Note: To better protect your account, make sure that your password is memorable for you but difficult for others to guess. Never use the same password that you have used in the past, and do not share your password with anyone. For security purposes, your new password must be a minimum of six characters long. A good password contains a combination of uppercase and lowercase letters (remember that your password is case sensitive), numbers, and special characters such as +, ?, and *.
For additional information on choosing a strong password, please visit the Yahoo! Security Center.