Roadrunner is one of the trusted webmail service providers. Millions of people trust Roadrunner to send or receive emails from each other. While using Roadrunner email, you can come across several issues that users face on a daily basis. Roadrunner Email Error 530 is the most common error among them. Roadrunner Email Error Code 530 is an authentication error that users receive when sending an email. It occurs when the domain (SMTP) of the recipient’s email address is not registered with the Simple Mail Transfer Protocol. This error can also occur if a user has configured incorrect login details. If you want to resolve this error, without wasting your precious time, you can immediately connect with our qualified professionals. We make sure that they will provide you with accurate solutions related to your problems.