Relevant excerpt
Unacceptable use of IT Resources includes, but is not limited to: … Harassing others by sending annoying, abusive, profane, threatening, defamatory, offensive, or unnecessarily repetitive messages, or by sending e-mails that appear to come from someone other than the sender … Intentional, non-incidental acquisition, storage, and/or display of sexually explicit images, except for acknowledged, legitimate medical, scholarly, educational, or forensic purposes. Exposure and/or display of such material may be offensive, constitute sexual harassment or create a hostile work environment.