Make sure on the computer, you are using SMTP.COX.NET, port 465 and ensure my connection requires a password is selected, (My connection requires authentication). The phone tends to work better using port 587. Do you have a windows computer to test with? There is a bug in the app email software that has issues with any mail server NOT an apple mail server, that pops up now and then. Also, when you double check your email settings, delete, and re-add your password, to force the device to overwrite the SMTP configuration, that sometimes helps as well. Personally, I use outlook on my macbook, it works better. I know saying microsoft and apple in the same sentence is heresy, but.....
