How can I set up Gmail on my iPhone 4S with Exchange? I have set up my Gmail account to send and receive messages from my business email address over Exchange on my iPhone 4S. I receive all messages fine, but it doesn't send messages from my business email address unless I am logged into Gmail in a web browser.
http://support.google.com/mobile/bin/answer.py?hl=en&amp;topic=14252&amp;answer=138740

The only thing to notice is the m.google.com server address.