Email stopped showing up

I have had my I1 for about 3 months. My work email was syncing and showing up fine until recently. I have not changed anything and neither has my work regarding email. I now have to close and open the inbox in order to refresh it and it to show new emails. They were showing up fine in the notification bar as soon as they would arrive.

Has anyone else had this problem and figured out a solution? I have tried shutting off the phone and removing the battery and restarting with no luck.

Thanks.