Hello and welcome to justanswer. My name is***** will be assisting you today. I am sorry to hear that you are having such trouble.
Do you get any errors?
Can you test to see if you can login to your mail account online?
Please ignore the popup it's automated.
You can test it online
Please click link below to open Centurylink webmail
If you can login successfully there we can check your smtp settings on your phone
It should be smtp.centurylink.net Port 587