DHI-NVR2104HS-P-S2

[Zoli]

Got an DHI-NVR2104HS-P-S2 and would like to set up some email alerts (for example no hdd or hdd error), but got no email option at the NVR's web interface as seen here:
Email/Email Notifications Setup GMail - Dahua Wiki

Got only the following options:
- TCP/IP
- CONNECTION
- DDNS
- SWITCH
- Easy4ip

Why is the email option missing? Thank you!