First, install POP3 and SMTP service components
Windows Server 2003 does not have the POP3 and SMTP service components installed by default, so we want to add them manually.
1. Install POP3 Service Components
Log on to the Windows Server 2003 system as a system administrator. Go to control Panel → add or Remove Programs → add/Remove Windows components, select the E-mail Service option in the Windows Components Wizard dialog box, and click the "Details" button. You can see that this option includes two parts: the POP3 service and the POP3 Service Web management. It is recommended that POP 3 Service Web management be selected for user-friendly remote Web management of mail servers.
2. Install SMTP Service Components
Select the Application Server option, click the "Details" button, and then view the details in the Internet Information Services (IIS) option, select the SMTP service option, and then click the "OK" button. Also, if users need remote Web administration for the mail server, be sure to select the remote Management (HTML) component in the World Wide Web service. When you have completed the above settings, click the "Next" button and the system begins to install the Configure POP3 and SMTP service.
Second, configure the POP3 server
1. Create a mail domain
Click the "start → admin tools →pop3 service" to eject the POP3 Service Console window. After selecting the POP3 service in the left column, click on the "new field" in the right column, pop-up the "Add Field" dialog box, and then in the "Domain Name" field, enter the name of the mail server, that is, the email address "@" after the section, such as "mail.com", and finally click "OK" button.
2. Create user mailboxes
Select the newly created "Mail.com" field, click "Add Mailbox" in the right column, pop-up Add Mailbox dialog box, enter the mail username in the "Mailbox name" field, then set the user password, then click "OK" button to complete the creation of the mailbox.
Third, configure the SMTP server
Once you have completed the configuration of the POP3 server, you can start configuring the SMTP server. Click the "start → program → administrative Tools →internet information Services (IIS) Manager", right-click the Default SMTP virtual server option in the IIS Manager window, select Properties in the pop-up menu, go to the default SM TP Virtual Server window, and switch to the General tab , select the IP address of the mail server in the IP Address drop-down list box. Click OK and the SMTP server defaults to anonymous access, opens the switch to the "Access" tab, clicks the "Authentication" button, removes the "Anonymous access" option in the dialog box, and selects Basic authentication (base authentication). Such a Simple mail server is set up to complete.