If you are running Windows 2000 or higher then you can be notified if an event log is full.
All event logs monitored by your filters will be checked in the interval (must be multiple of 10 seconds) you specify. If a particular event log is full then the specified Smtp action will be notified. No messages will be written to the event logs. An email with the following text will be sent:
The event log Security is full. Please increase the size of the event log or clear the eventlog. Please note that this is an email-only message that will not appear in the Application event log or in other targets.