Drobo 5N2 User Manual page 179

On critical situations only – Alerts will be emailed only to warn of a critical status with one or
●
more of your Drobo devices that could lead to potential data loss. These are Critical Drobo Alerts,
which can include when your Drobo device cannot currently protect your data against drive failure,
when your Drobo device doesn't recognize one or more of the drives installed, when your Drobo
device does not detect any drives or when too many drives have been removed.
Related topic:
Setting Up or Modifying Email Alerts
Drobo5N2 User Guide 179