My outlook is not working.

To get in I have to try a couple of times and then I get in. I can send emails, but Outlook is not receiving emails for me.

I uploaded my emails from Outlook Express. The upload did not end succesfully. Same result when I tried again.

I can see my uploaded emails though, in Outlook.

I am using Outlook for the email account of my own provider (xs4all). It is a POP3 account.