For the B800i device - B800i_GSG_Rev02_US.pdf - you have to disconnect the USB cable from the device and only use the Ethernet cable to use the device in it’s desired iSCSI mode.
Note: Only the USB cable interface or the iSCSI (Ethernet) cable interface can be used at any one time. If both are plugged in, only the USB interface will be active. USB 2.0 USB (Universal Serial Bus) is a popular interface that allows you to attach additional hardware devices to your computer in a plug-and-play style. On the Drobo B800i, this connection is used only for initial setup
If the USB cable is disconnected… how does the B800i device send an email? Does the device establish a TCP/IP Connection over the ethernet port that it uses to do it’s iSCSI stuff on? If the device is setup on a private 192.168.x.x. network and connected directly to the server… how is an email supposed to get sent out? The 192.168.x.x. network can’t talk to a mail server… so how can the B800i device? I can’t understand / see how that works…