The idiot I "chatted" with says Cox.com was created last January 23, 2017. Everyone with a brain knows if an email doesn't come from a legimate address (would you open one from cox.org? i wouldn't!), it's a phishing scam and you just delete it. I've been putting blocks on anything from cox.com because there's never been any such address serving me for 35 years.
I get a post office letter from "cox.com" today telling me all my email won't work anymore by Jan 24th.
So the domain addition is a big secret, and there's no notifications or messages in my online access mentioning the security action needed.
From what I read here, sounds like NOBODY's going to get any emails, whether you follow thier instructions or not.
Typical Cox.