State Department official Rexon Y. Ryu sends an email to about a dozen other US officials, mostly also in the State Department. He says, “All – below is a conversation that Salman Ahmed had with Lakhdar Brahimi on Sunday. Ask that you keep this closehold, given the frankness of his comments.”
Salman Ahmed is a US senior policy advisor, and Lakhdar Brahimi is the United Nations and Arab League Envoy to Syria. The email discusses the civil war in Syria, and large portions of it will later be redacted. But most notably, the name and email address of one recipient of Ryu’s email will be redacted because that person is a secret CIA official.
Clinton aide Jake Sullivan is another recipient, and he forwards the email to Clinton. (US Department of State, 2/13/2016)