You must be running iPhone software v2.0 or higher to use this feature.
To determine which version of the iPhone software you are running click here.
On your iPhone running iPhone software 2.0 or higher:
Select Settings
Select Mail, Contacts, Calendars
Select Add Account...
Select Other
Name: Your Name
Address: username@exchange.mit.edu
Password: yourpassword
Description: MIT Exchange IMAP (this can be whatever you'd like, it describes the mail account)
Select Save
In the new screen, make sure IMAP is in blue.
Your Name, Address, and Description should of carried over from the previous screen. If not fill in the information.
Under Incoming Mail Server:
Host Name: imap.exchange.mit.edu
User Name: username
Password: yourpassword
Under Outgoing Mail Server:
Host Name: outgoing.mit.edu
User Name: username
Password: yourpassword
Select Save
You may receive a "Secure Connection Failed" prompt, if so click Continue. This is a standard certificate prompt, the connection will still be encrypted via SSL.
Once the iPhone has communicated with the Mail server to verify your settings, you are done. To access your mail, go back to the Home screen and select the Mail icon. 