I am sorry to hear that you had difficulty with the transition to Yahoo. It seems to me a foregone conclusion that anyone in that move had a nightmare experience. I consider it a tragedy that Cox decided to divest its mail service. Further, it was extreme disloyalty that Yahoo was chosen as the email provider and customers had no choice in the matter.
I had so much difficulty in a transition that I got a separate email and have transitioned all important traffic to that email. Unfortunately, that did not correct the damage done by not having access to important emails I received since then. It was not until yesterday that I was able to complete the transition and retrieve the misrouted emails.
Yahoo now feels entitled to charge customers $5 a month for service that was provided as a part of Cox internet service until April 5th. What's more, all my attempts to set up IMAP or pop mail to an ordinary mail reader have failed.