https://www.vox.com/policy-and-politics/2016/10/28/13456368/...
"Seemingly skeptical (and rightfully so), Podesta forwarded the email to his chief of staff, who then passed along the email to the campaign’s IT team. This is where things go so painfully wrong: The campaign’s IT team incorrectly identified the email phishing for Podesta’s password as legitimate, instructing him to change his password."