Beside this, what does login failed mean?
An "Authentication Failed" error means the email server cannot verify that your email access is authorized. This is typically due to a mistyped password, but it can also be caused by an incorrect username, connecting to the wrong server, or blacklisting.
Subsequently, question is, why does my hotmail keep saying sign in failed? Welcome to Microsoft Community. We are glad to assist you with your concern. Based on your description, the account works fine but is giving a “Sign-in failed” error message after a certain period of time. The error message that you have encountered could be caused by an incorrect configuration on your mobile device.
Subsequently, one may also ask, why does my email say couldn't sign in?
You may have attempted wrong a time or two from the phone and its asking for verification which you cant do there. So go to a computer, sign into it, then go to your phone and try to sign in.
Why does my Yahoo email keep saying sign in failed?
There may be a problem with your Android device, contact device manufacturer, or navigate help pages. Delete Cache and cookies – First clear mobile browser cache and cookies, then sign out of your Yahoo mail account and sign in again. If you are using your Yahoo mail on a mobile app, clear your app data and cache.