The default SMTP virtual server starts when you install Exchange. You can start, stop, or pause the default virtual server in Exchange System Manager.
Note You can also start, stop, and pause the entire SMTP Service. However, if you have more than one virtual server, stopping the service affects all of the SMTP virtual servers running on your computer. When SMTP Service is stopped, you can still perform administrative functions on an SMTP virtual server.
To start, stop, and pause SMTP virtual servers in Exchange 2000: