In addition to viewing probe status within the RHN interface, you may be notified whenever a probe changes state. This is especially important when monitoring mission-critical production systems. For this reason, Red Hat recommends taking advantage of this feature.

To enable probe notifications within RHN, you must have identified a mail exchange server and mail domain during installation of your RHN Satellite Server and configured sendmail to properly handle incoming mail. Refer to the Installation chapter of the RHN Satellite Server Installation Guide for details.