I use Apple's Mail Application. My iPhone 4S has three email addresses, all POP3, on comcast.net. I accidentally dropped the phone but managed to minimize the thud on the table top. The phone still works with one exception. One of the addresses now shows a warning window that says ""Cannot Get Email--The mail server "imap.comcast.net" is not responding. Verify that you have entered the correct account info in Mail settings.""
I cannot figure out how to "change" it back to POP3. Assistance would be greatly appreciated.