vSphere Alarm Notifications Fire During Maintenance Mode Despite Suppressed Actions

A vSphere alarm is configured with an automated action but notifications disabled. The goal is to determine whether email, SNMP, or syslog notifications can still fire when the host or cluster enters maintenance mode, depending on the installed vSphere major version.

Alarm actions and notification channels are separate settings, so suppressing the action should not automatically suppress the notification. Version-specific behavior around maintenance mode and alarm state inheritance remains uncertain without checking the current release documentation.

Does vSphere continue to send alarm notifications during maintenance mode when the alarm action is suppressed? Are notification suppression rules scoped to a datacenter or cluster sufficient to prevent unexpected alerts? Which vSphere versions separate maintenance mode behavior from alarm notification delivery?