https://www.vox.com/policy-and-politics/2017/8/1/16075340/email-prankster-white-house-officials-scaramucci-priebus
"On Monday, CNN reported that several White House officials including former communications director Anthony Scaramucci and Homeland Security Adviser Tom Bossert were tricked into corresponding with a UK-based, self-described "email prankster." This report comes just days after it was revealed that US Energy Secretary Rick Perry unwittingly spoke to Russian jokesters about energy policy."
