Supporting Messaging Clients

Assign an IP Address, TCP Port, and SSL Port

The default virtual server is created with an IP address of (All Unassigned). For instant operation, the POP3 service is identified on the network with the Exchange computer's IP address. This allows incoming connections on TCP port 110, and uses a Secure Sockets Layer (SSL) port of 995. For instant operation, you can use the default IP address, TCP port, and SSL port, or you can assign a different IP address from any available network card. However, if you plan to create multiple POP3 virtual servers, you must create a unique combination of IP addresses, TCP ports, and SSL ports for each server.

Important   Even if you leave the default SSL port set to 995, to fully enable SSL on the POP3 virtual server, you must request and install a certificate.

To assign an IP address, TCP port, and SSL port:

  1. Start System Manager
    on the Start menu, point to Programs, point to Microsoft Exchange, and then click System Manager.
  2. Navigate to POP3.

    System Manager

    1. Administrative Groups
    2. Administrative group
    3. Servers
    4. Server
    5. Protocols
    6. POP3
  3. In the console tree, right-click a virtual server, and then click Properties.
  4. On the General tab, in IP address, select (All Unassigned) or choose a specific IP address from the list of available network cards.
  5. To set the TCP or SSL port, click Advanced.
  6. On the Advanced tab, click Add.
  7. Select an IP address, and then type a port number.
  8. Enter an SSL port number.