How can I configure the POP3 service under Windows Server 2003?

Right-click the machine name, then select New, Domain.

Enter the domain name (e.g., savilltech.com), then click OK.

Select the new domain and select Add Mailbox from the list on the left-hand side of the tool to open a dialog box that lets you enter a name for the mailbox and optionally create an associated user. If you don't select "Create associated user for this mailbox," as this figure shows, the specified user must already exist.

After you add the new mailbox, Windows 2003 will display a dialog box that provides the information (e.g., server name, username) that you must enter to configure your mail client.