I get this issue about once every two weeks on my email. The only fix I have found is to clear the email data. Problem is I have to do it every two weeks and if this continues this thing is getting trashed. I am using the stock email client to exchange. I only have my exchange account and the google account. I hit email and it opens for a split second, then closes back to the home screen. Clearing the cache doesn't work. I'm sick of this phone. Any thoughts on a fix?