Supporting Messaging Clients

Control Access to the POP3 Virtual Server

By default, any POP3 client that supports Basic Authentication can access a POP3 virtual server. To restrict access to the POP3 port, use selective authentication methods, or list only specific computers that are allowed to use the service.

Tip   You can also control access to a server by disabling the use of the protocol on a per-user basis.

To control access to the server: