For those that do not understand the subtext, the reason Napolitano does not use email is that there is no persistent, written record with her name on it that can be used as evidence against her. This is a common strategy/policy used by many people, particularly among the political class. It is an excellent way to inject ambiguity into any potential culpability. It is a common practice for people that wish to minimiz…
At the same time (at least in Germany) they want to force citizens to use email (accounts) where they have complete control of the servers / infrastructure it is provided from.
In the US they are e.g. strangling GAO that has at least in the past created some level of accountability for government dealing. Other means of oversight are also step-by-step turned into false fronts.
If you go from email (for which regulations for record keeping exist) to other means of electronic communications (e.g. rt-messaging, encrypted messaging with personal / keys linked to your gov. position) you at best increase the efforts for recovery to a level that it becomes infeasible in most cases or make it impossible when [due to strange coincidence] the crypto-keys have been lost.
Guess it more-and-more becomes clear where this is leading to in the long run - zero accountability and arbitrary state power where you have to prove that something is not right (which you then of course can't).