In Outlook there is an icon that will tell you if you are working Offline or Online:
Offline means that you are just working from your computer, Online means you are connected at all times to the outlook exchange server. If you are offline you will not be able to send or receive current messages, however, you can look at any e-mail that was received up to the time when you went 'offline'.
To view your Online status: In Outlook; look at the lower right hand corner above the clock in the Outlook window for Offline and click the black down arrow and click work offline to uncheck it.
Login to Outlook and everything stuck in the Outbox should be sent out and you should see e-mail flowing once again into your Inbox. You may also want to try and log off your computer and log back in.
