My email keeps saying invalid username or password

If you have more than one device checking your @connectnc.com, @pinehurst.net emails at the same time, the device which logged into your account first has locked your email box during that time. Either shut off the second device or set the email check times to be at separate intervals. This happens frequently with devices like ipads, Droids, iphones or other email devices, if you also have your main computer logging on and checking at the same time.