iPhone 4S, has been working fine since I got it 3 months ago. Suddenly last few days e-mail will not send, I get the following display; Cannot Send Mail The user name or password for "SMTP.(my e-mail add)@smtp.comcast.net is' incorrect. Settings OK I have changed nothing. I can still receive e-mail and since my phone is synced to my iMac all setting for e-mail on my iMac and phone are the same. And, there is no problem sending mail from the iMac. Mail fails on both 3g and WI FI. Any ideas anyone?