No, it's not a private matter, actually. This is someone you claim is writing correspondence to the Prime Minister's Office on your behalf. We want to confirm that this person actually exists, because the correspondence that has your name on it contradicts the testimony that you've given directly. You will need to provide it to prove that you in fact actually are telling the truth here, because it's very hard to believe.
You said you sent a hundred different e-mails thanking people for their role in setting up the Canada student service grant. Is that what you said?