Yeah that's definitely in excusable. But what makes me even more curious is the care the author took to explain that it was only the unclassified system. So what about the classified network? SIPR? CENTRIXS? Are we to assume that HRC didn't send/receive any classified email? That just seems odd. So I'm starting to think that a) she did, in fact, have a government email to handle the classified material and b) chose to have her unclassified email off the network for other reasons that remain to be disclosed.

Edit: I suppose there are other options. She could have used a staffer's email to send messages on the classified networks.