You can user notifications in Device Manager to do the following:
Notifications are used to send messages over three different channels: SMTP, SMS, and Agent Push (currently iOS only).
Before you can send notifications, you must configure a notifications server and a SMS gateway and carrier SMS gateway. Also, you must select a notification channel in the notification template.
Note: Port 25 must be opened from the Device Manager server located in your DMZ to point back to the SMTP server on your internal network for notifications to be sent successfully.