The Alert column indicates whether an Alert message is sent for this event, group, or category. The checkbox displayed for an Event in this column corresponds to the Enable checkbox setting for the Send Events as E-mail Alerts option in the Edit Log Event dialog.
The checkbox or indicator for Alert applies to both sending of an email per-event and to the generation of an SNMP Trap (if SNMP configuration is enabled). For E-mail Alerts, the E-mail Address is either the global value set in the Send Alerts to E-mail Address field in the Device > Log > Automation > Email Settings page or the custom address configured in the Send Alerts to E-mail Address field in one of the Edit dialogs launched from the table on the Log > Settings page.
Whether the message is sent is shown with a To show or hide indicator. To change whether the Alert message is sent for: