On Tue, Nov 25, 2014 7:50 AM PST, we noticed an attempt to sign in to your Yahoo account narrongs from United States via an app.
If this was you, please sign in to Yahoo from your mobile web browser before signing in to the app again. Or, you can access the app and increase the security of your account by enabling Second Sign-In Verification and creating an app-specific password.
If you haven't recently signed in from United States and believe someone may have accessed your account, please visit this link to change your password and update your account recovery information.
Thanks for taking these additional steps to keep your account safe.