Same problem others are having with push email. Sometimes it automatically checks, others not. It seems that once the phone goes to sleep mode, the data service is turned off? I have it set to fetch every 15 min if data is off, but that hasn't helped. I have to go to the message screen and press each individual mail service (I use my godaddy.com account) in order for it to sync and retrieve mail. Maybe I am spoiled after using Blackberry for email service. I hope this is just a software issue and can be fixed easily. I am a business user that needs to respond to emails as soon as they come in - if not fixed, my Blackberry will get revived.
If anyone finds a solution for this, please post! Thanks!
My Exchange email is working better than it did with my previous Windows phone lol. I know if you change the power settings to performance mode, it will keep your connection active.