obligatory - that first famous private server was done because someone wanted a blackberry like Obama had, and was told no by NSA. Man that BB keyboard was good.
https://www.npr.org/2016/09/08/493133413/colin-powells-ways-...
Of course that pales in comparison with the practices of the GWB White House:
https://www.newsweek.com/2016/09/23/george-w-bush-white-hous...