HI,

You may get the following error message:

Your UserName was rejected. Account: 'mail.resource24.net', Server: 'pop3.norton.antivirus', Protocol: POP3, Server Response: '-ERR', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90

Solution
This error message is caused by the fact that you have set an anti virus program, in this case Norton AntiVirus, to scan all emails automatically.
Changing the settings within Outlook will not solve the issue. You need to go into your Norton Antivirus Control Panel and change the settings there.

You may get the following error message:

There was a problem logging onto your mail server. Your Password was rejected.'pop.resource24.net', Server: 'pop.resource24.net', Protocol: POP3, Server Response: '-ERR invalid user or password', Port: 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC92

Solution
Check your Outlook setting and make sure that your full username and password are correct.
If you are still having problems, it could be that your password has somehow become corrupted. Try changing it in My Account.