Define 'personal'
This would be interesting if it wasn't so obvious that the "private communication" in question was probably that of the aforementioned 47 Councillors.
I'd hazard this has less to do with protecting citizens right to a private life and more to do with the Council members just found out their email gets archived; and would rather it wasn't.
Blanket changes across a continent probably seemed like the best way to resolve their problem... instead of has has already been suggested, just not emailing people they shouldn't about topics they probably shouldn't be discussing.