IOS7 iPhone emails disappearing, are not delivered
Ever since I upgraded to IOS7 on my iPhone 4, I cannot send email. After I write the email and send it, it disappears. It does not show up in sent mail, and the intended recipient does not receive it. This happens on gmail, yahoo and aol accounts. I can send and receive email just fine on my PC laptop. But no longer on my IOS7 iPhone. Occasionally the iPhone email is delivered hours later, but that is rare. I have "rebooted" my iPhone, with no effect. Can I fix this? Is it my iPhone or is it IOS7? Can/will Apple fix this? Anyone else have this problem? Anyone know what I can do?
iPhone 4, iOS 7.0.2