Like many users, I've been having trouble sending emails from my iPhone 5 since updating to iOS 7. I tried everything I read online (restore and clean install and setting up my emails fresh (not from a backup), deleting accounts and adding them manually, hard reset and even tried taking the SIM out and putting it back again. I honestly probably tried over ten things and still nothing. I use email for both work and school and all of my work emails need to be replied to promptly. Yesterday I updated to iOS 7.0.4 and to my surprise I was able to send emails and they'd actually send. It worked for the first few emails and then it stopped working. Tried a few of the solutions again and still nothing. I'm forced to take my MBA, and use my iPhone as a hotspot, with me now everywhere I go in case I have an email I need to send out for work. And this problem is persistent between iCloud emails, Gmail and Google Apps. I'd honestly appreciate any advice at all. I did go to an Apple store and called Apple support and they were helpful, but they couldn't even fix it.