I have an Iphone 4 and have upgraded the IOS from 5-1 to 6.1.3. Since then have been unable to send mails from my POP account. the notification "Cannot Send Mail. A copy has been placed in your Outbox. The receipient, "XXyyyX@gmail.com was rejected by the server" displayed. Please Help. the same thing happens when I configure my POP account on my Son's Iphone4, and there is no problem in receiving and sending mails from my Outlook. Please Help!!!!!