A quote from their blog: From Yahoo!'s viewpoint, any type of signed-in individual engaging with Yahoo! services is a valued user, whether she authenticates utilizing a Yahoo!, Facebook, or Google ID.
Yahoo Mail Login Using Facebook
Login to Yahoo Mail account on PC/Desktop computer
First you require a username and also password; now open internet browser from your computer/desktop. After that open web page www.yahoomail.com on it. To launch their brand-new "one-click" sign-in simply click on the "Sign in with: Facebook" symbol on the Yahoo! login display. That's all you need; to obtain gain access to of your Yahoo mail account.
Login to Yahoo Mail account on Mac computer system
If you are a customer of Mac computer system then Safari must be your web browser. Safari is the very best surfing option for Mac OS; Safari is quick, quicker and also easy to use browser. You can quickly access your Yahoo Mail account with it. See, the best ways to login with Yahoo mail account on Safari internet browser. Simply open Safari and kind www.yahoomail.com; you will certainly be guided to Yahoo mail sign-in web page. To initiate their new "one-click" sign-in merely click the "Sign in with: Facebook". You are then completely authorized right into Yahoo!
Nevertheless, a recommendation- you still won't be able to authorize right into a mobile or desktop customer making use of Google OpenID.
I hope this post could help you. Thank you ...