iOS problem with Comcast mail

I was prompted to change my Xfinity password. I did that and of course I couldn't get email on my Mac. I entered the new password and could again get email. However, despite having the right box checked in security settings( allowing 3rd party access); I can not get Comcast email on my iPhone or my iPad. Changing the password on those devices didn't work. Deleting the account; restarting the device and attempting to add the account results in a message "No password provided for "Comcast" Please go to mail settings and enter a password." Of course that is impossible because the account hasn't been added.