I've had no problem with them either. And what are the specs that are out of spec? Where do you find the correct specs and what do they mean?.My modem provides no logs relevant to "signals" or whatever you mean by that.
As far as email, I have several email addresses: Gmail, Yahoo, Microsoft and Cox. I use Windows Mail for all of them. If you know what you're doing they all work fine once configured correctly. And if you're not talking about Windows 10, where are you having email problems?
And what do you mean by "game controllers"? How could a problem with a game controller have anything to do with Cox.
Thank you for proving my point about the clueless chiming in with nonsensical misinformation.