Including Thomas Jefferson

And almost everybody else. Actually, Kerry is only the third secretary of state to ever use much email, so it’s really just him, Clinton, and Colin Powell.

Clinton says John Kerry was the first secretary of state to rely on a government email account | PolitiFact

"In fact, beyond Clinton herself -- and Kerry, who has to abide by a requirement to use departmental email -- we only have three secretaries of state to consider. They are Condoleezza Rice, Colin Powell and Madeleine Albright.

"Of those, Powell is the only one who used email very much at all."