Thanks for the additional information. If I understand you correctly, you have a Windows 2000 workstation attached to a Microsoft network hosted by an NT 4.0 server. The NT 4.0 server is handling the printer traffic and is issuing printer-related messages about print jobs submitted from the Win2K workstation back to the Win2K workstation.
These messages are called "administrative alerts" and are generated by the server system. There is no way from a workstation to influence the Alerter or Messenger services without some system-level coding on both the server and client sides.
When these alerts relate to printing, they are generally warnings about printer problems. NT 4.0 servers maintain a list of alert recipients based on user or computer name.
For alerts to be sent, the Alerter and Messenger services must be running on the computer originating the alert. For alerts to be received, the Messenger service must be running on the destination computer.
If you do not need to receive these Alerts, simply Stop the Messenger service on your Win2K workstation. Or, you may need to get with your network administrator to have your Win2K workstation removed from this list if you do not need to see these messages.