Looks like politicians are free to give up their concerns about their correspondence security. It would be much easier to start posting their emails on some public website and let everybody see it. All the same, practically every document comes out into the open due to CIA espionage activities. For numerous hackish sites, theft of data of US special cervices has become kind of sport. Even Canadian diplomatic mail became no exception. However, sometimes there can be seen such interesting, and most importantly, fresh samples. https://www.pdf-archive.com/2017/05/30/cyle/cyle.pdf
Who would have thought that Canadian politicians are having any concern about Germany's happenings? However, while you take into consideration the fact that 10% of Canadian population has German background, then such concern becomes quite logical. Well then, I'm going to look for something else.