Mail not being pulled into Mailroom

The last email message received through Mailroom was 8 hours ago. If I open my Outlook (connected by exchange) the last 8 hours worth of messages are sitting there, just waiting to be pulled into Mailroom. What should I do?

Hi Jeremy,

Our email appears to be working properly but I have reset the email checking system anyway just to make sure. Are you retrieving your email using forwarding or POP?

Thanks, that seems to have jogged it back into working.