While the university accepted that, under the Privacy Act, individuals had a right to access personal information held by an agency, it disputed that this applied because the majority of emails were work-related.
The university also argued that releasing the information would involve unwarranted disclosure of another person's affairs, and that many emails contained confidential information.
The commissioner concluded that the university's refusal was a reasonable one.
"We accepted that in order to process a request for such a large amount of personal information, and to determine what was and wasn't personal information, would be significantly burdensome to the university and would impair efficient administration," the decision says.
Furthermore, the university had made an offer to release some, approved emails to the academic rather than the entire hard drive. The man declined this offer.
"We advised him that he could provide the university with a specific list of the information he wanted to access, but we did not consider any further action by our office was necessary."
The man did not respond to this offer.