Bullshit. Federal Records act has been out there since 1950. It was written broadly enough to cover these records when email came into existence.
I lost my private sector job in the Democrat caused recession of 2006. I started working for the government in the DC area a year later. When I was first hired, one of the first things emphasized was that ONLY messages coming from an official government account were actionable and all official messages HAD to be sent on official, department created email. No I don't work at State. I work in a far more low level position in an agency that has proven amazingly resilient at avoiding Executive Orders for as long as possible, but they sit straight when Congress updates the law. And nothing scares them more than the Federal Records Act.