VariableFILTER_ALERT_MAX_EMAIL_TRIGGER_LIMIT
Description Sets the trigger limit for filter alerts having emails attached
Default15 triggers/minute
Minimum15 triggers/minute

This variable allows to configure the limit on how many times Filter Alerts with one or more email actions attached can trigger per minute. The maximum value, and the default, is 15 triggers per minute. If a filter alert uses multiple actions, 3 for example, each event — even though being sent to 3 actions — only counts as one trigger.