Whether it's faux outrage or not I keep trying to figure out why. Why would you feel compelled to setup an email server in the basement of your house instead of just using your employer's standard configuration already in place?
I used to work for a (very) large software company and it never occurred to me that maybe I should configure my own email server out of my house instead of using our internal setup. Obviously it would be in direct violation of my employment terms, but beyond that....why even bother?
There are a lot of times to sidestep official IT doctrine. My biggest violation was hooking up personal devices to the email server as clients, but I heard of others who forwarded all their work email to gmail for the superior search capabilities.
Usually this happens because IT is typically viewed as a necessary cost, not something with an ROI. So it normally falls behind current technology because migrating is a big "extra" cost. If access, ease of use, or other features become too far behind available technology, people will tend to go rogue. Of course, typically this isn't a proper IT solution, so security and disaster recovery are often completely neglected.
In this case, you are talking about an email server possibly set up by the same people who wrote health.gov 1.0. Take a good look at
www.state.gov - it looks about 10 years out of date just from a style perspective.
I make no claim that this was Hillary's motivation, or that it is justifiable.
I think the harder thing to figure out is why her private and public emails were not more separated. I keep hearing about how she had a bunch of email that was not work-related on her oddball server. Just too lazy to set up a second server for that, but did have a separate address? Or was she sending random emails on her work address, for personal stuff like her pedicure appointment?