I'm not sure I understand either your question or your problem. Outlook is a mail client; IMP is another. You wouldn't use both of them at the same time.
To set up outlook, you'd make a new mail account with your e-smith server's address for the incoming and outgoing mail server. I'd advise using IMAP instead of POP to retrieve mail.
If this doesn't help, we'll need to know what's happening (with error messages, if any) to be able to help.