Edimax Technology NVR-4 - Manual (Page 71)

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Remove: Click one schedule name in the schedule list to be changed; it will be OK
just to press Remove button. If there is still set trigger data in the schedule, there
will be a warning note shown, and “remove” is prohibited.
3.6.2 Event Server
Administrators can add/modify/remove event server setup data at will.
SMTP server
Enable SMTP: With setup to enable SMTP; only with setup for event trigger,
message can be normally sent.
SMTP main unit location;