Outlook Problem

For several months, I have been unable to use Microsoft Outlook (my default e-mail) to recieve e-mail. I have to use hotmail.
Outlook express is unavailable for use too. On both programs I get the following error message:Unable to logon to the server using Distributed Password Authentication. Server Response: ‘ERR Permission denied’. (Account: ‘MSN Mail (1)’, POP3 Server: ‘pop3.email.msn.com’, Error Number: 0x800ccc18).

Please advise.