Outlook only works when I restart

HI all

Any help welcome.

I set up an exchange account on my Microsoft Outlook 2013.  I have Windows 8.

However, it will only send emails if I close down and restart.  Otherwise emails stay in my outbox.

The same is true for incoming messages.  Clicking send and receive simply freezes the machine and never completes the task.  Shutting on and off is the only thing that works.

I have tried this in safe mode and amended send/receive settings yet nothing seems to work.

Thanks in advance