If you are seeing an authentication failed error during RR login, you can fix it quickly by checking a few common issues. First, make sure your roadrunner email login » username and password are correct and updated. Also verify your rr.com email incoming and outgoing server settings, as incorrect ports often cause login failures. Clearing cache, updating your email app, or trying another device can also resolve the issue. If two-factor authentication is enabled, ensure you enter the correct verification code. Finally, reset your password if the issue continues. These simple steps help restore smooth and error-free RR login access.