'Google may block sign in attempts from some apps or devices that do not use modern security standards. If the access to less secure apps is disabled, you'll see a 'Password incorrect' error when signing in and you can't set up a Google account on your device. * desktop mail clients like Microsoft Outlook and Mozilla Thunderbird. * some built-in Android mail apps not developed by Google
* the Mail app from Windows Phone 8.0 or earlier Many mail apps use insecure sign-in standards:
