It is sent using the Alerter Windows service and is received by the Messenger Windows server. The Messenger service is no longer
enabled available in newer versions of Windows, and for good reason, since it's an easy way for people to send annoying popups to your machine. I would recommend against using the NET SEND-type alerting built into SQL Agent. What are you trying to do?
There are no special teachers of virtue, because virtue is taught by the whole community. --Plato