If you have a multiple POP3 mailbox which is capable of handling the collection of mail for any number of users then you should enter the login name and password for this mailbox in the POP3 page of the Internet Service property sheet.
Note: If you will be collecting mail for your workgroup through one or more single-user POP3 mailboxes, then you must specify the details for each of the POP3 mailboxes in the User Settings property sheet on a per-user basis. For more information see Setting Up Per-User Information. In this case you should leave the Login Name and Password fields blank on this page.