The reason for this error message is that either the password you have entered is incorrect, or you have not used the complete e-mail address as an incomming mail username.
You should make sure that you are using the correct password and that the mail username is in the format:
user@yourdomain.com
Setting up your email is easy when you have the right host by your side. If you need a reliable partner to help you resolve email issues and provide expert support, check out our email hosting services.