https://www.vice.com/en_us/article/akdzgp/the-goal-of-irans-fake-proud-boys-emails-was-chaos

On Tuesday, hackers sent thousands of emails urging voters in Florida, Alaska, Arizona, and other states to "Vote for Trump or else!" in messages that included the voters' home addresses. The emails were designed to make it look like they were coming from the Proud Boys, a violent, far-right group that was recently name dropped by Donald Trump during the first presidential debate. 

Less than 48 hours after people started receiving the threatening messages, the US government publicly accused Iran of being behind the campaign. In a short and late press conference on Wednesday, the Director of National Intelligence John Ratcliffe called the emails and an accompanying video "desperate attempts by desperate adversaries” that had the goal of "intimidate or attempt to undermine voter confidence."