Cox Cable has admitted to me that they are incompatible with Windows 10 for email purposes. I can receive email sometimes but can never send email. Cox claims that the problem is related to changes they had to make to their servers to prevent future hacking. In the meantime I’ve had to revert to Old Windows 7 desktop. Cox admits that the problem may not be solved until March 2017. They refused to give any consideration on billing even though they can’t provide full internet access.
When Win-10 first started appearing on the upgrade horizon I heard many a complaint about “I lost my email!”. When I pressed for details I confirmed that they were using web-based email (gmail, hotmail, etc) and the default Win-10 web browser - Edge.
It was the browser every time. I showed them how to launch Internet Explorer (or better yet, install an alternate browser like Firefox or my favorite - Pale Moon).
Without exception they all reported that they “got their emails back!”.
If (when) you find yourself on a Win-10 machine make sure to dump Edge.