I have been unable to sync my Cox.net e mail account. Have tried several attempts at different times, and confirmed my password. G mail was no problem, but I don't use it. Fustrated!
You might have to manually set it up. Have you checked the Cox website for the mobile server settings?
From Moto's website, here are the steps.
To setup Cox.net as a POP3 account:
Auto-Configuration Steps
Manual StepsThe following steps represent the manual process to set up the DROID RAZR to send and receive Cox.net email if the automatic configuration does not choose the correct settings.
Refer to Email Server Names to confirm mail server names.