Further to post on setting up mac mail on K850i http://www.howardforums.com/showthread.php?t=1403589

Configured for pull wanted to go push, however, the Push option on the K850i was greyed out.

Solution:
- On Mac go to System Preferences>MobileMe>Synch
- Check the checkbox for Synchronize with MobileMe to on (check)
- Select Automatically from the drop-down box
- Check "Mail Accounts" in the list below to enable mail synch
- Click "Synch Now"

On K850i
- Go to email
- Do a send/receive
- You should be prompted with a message saying push detected, do you want to use push?
- Choose yes
- Remember to go back into the email settings and turn the interval checking time to Off
- Test...email should now be pushed to device with no polling/pull function

J.