So I've been thinking about this, and even if Menard got the order and its real it doesn't really say anything. I am assuming the Canadian legal system is like the United States legal system (which can be a dangerous assumption, I know, but..) in that anyone can file a lawsuit for any reason as long as its formatted properly and you pay the fees. I do believe the US legal standard here is that there is an assumption that the filing party is sane (another dangerous assumption when it comes to Menard) and that the statements made justifying initial discovery motions have the possibility of being true.
What Menard has done, if its real, is I believe the US version of a "motion to compel discovery" - which can only be objected to if the documents demanded are irrelevant to the case or is protected by privilege. And since the organization who received the demand probably has no interest in formally objecting (its just an email after all), and it is materially relevant to the case (even though the case is BS and would lose eventually anyways), then I don't know why Menard thinks hes done something so amazing here.
For example, if I wanted to tomorrow I could file a lawsuit against Robert Menard's for slander against JREF and then get a motion to compel for him to produce all documents mentioning the JREF in the past 2 years from his private emails. Assuming that I paid the filing fees, formatted the request properly, and otherwise appeared to not be a total nutcase, I would probably get it. The slander could be completely made up (and it would be thrown out since I wouldnt have standing, again that reality is irrelevant for purposes of the motion), it doesn't matter, the court will assume its true for purposes of discovery as long as it sounds not totally fruitcake-ish.
So...to conclude...even if its real, color me completely unimpressed.