Sending IOS email

I have been unable to send iOS email from my cox account on my iPad since around Christmas. Now my iPhone won't send either. I have checked all cox and apple troubleshooting and have my incoming and outgoing mail settings exactly as they suggest on both the phone and the iPad. My gmail works on both iOS products just fine and my cox mail will receive without a problem.   I reset my password because I thought maybe I had forgotten the correct one. The password works in cox mail on the internet. I did get a new iPad at Christmas. I set it up exactly the same. What next?