Hie, I have been having this problem for long and even on my previous iPhone 4s. I have set up my gmail mail by : settings-Mail, contacts, calendar > add account > Google and set it up. I can receive all my emails without a problem but I CAN NOT SEND. I have tried setting with Exchange but I still can't send. Please help me, I don't want to use other apps for my gmail. Thank you
Sent from my iPhone 6
Sent from my iPhone 6