I am unable to receive email on my computer, but I am able to send them. I am, however, able to send and receive email on my phone.

I am using Outlook 2007 on a Windows 8 computer. I do have POP accounts but nothing has changed recently and the last email i received was yesterday at 5:30pm when I usually receive over 100 emails a day and like I said, am able to get them on my phone.

This is the third time this has happened. The two previous times, I just magically started getting emails again. What is the problem?