Set up Hotmail on iPhone

Here are the steps to setup Hotmail to sync and push to your iPhone (this works on the iPad too):

1. Launch Settings
2. Tap on “Mail, Contacts, Calendars”
3. Tap onto “Add Account”
4. Select “Microsoft Exchange”
5. Enter your full Hotmail email address into both the Email and Username fields
6. Leave Domain blank
7. Enter your password
8. Enter your prefer Description
9. Tap onto “Next”
10. Now you must enter the server, use “m.hotmail.com” for the Server name then tap onto “Next”
11. The iPhone will now verify that your Hotmail information is entered correctly, the next screen you’ll be able to enable Mail, Contacts, and Calendars

Source: http://osxdaily.com/2010/08/30/use-hotmail-on-the-iphone/