It sounds like the guy was only interested in masking HRC's email address in the email sender and/or recipient fields in the MIME headers.
I don’t think the guy asking the question was a Tech Guy, I think he was a “pointy-haired” Management type of tech guys, knows just enough and dresses well enough to get a fancy title. I heard his title somewhere but its not worth the effort to dig that back up.
It would make perfect sense for him to not want to share the nature of the “issue” for which he sought help with any Techie that worked there, fewer the better in awareness of the wash of the corrupt activities.