Violation of Executive Order 13526 and 18 U.S.C. Sec. 793(f) (unlawful to send or store classified information on personal email). Former CIA Director John M. Deutch had his security clearance suspended for using a personal email to send classified info; and Gen David Petraeus pled guilty in a court hearing for doing the same.
Also violations of the 2009 Federal Records Act and the Freedom of Information Act.
She's done something indictable, as evidenced by those others that were indicted for similar violations. Shucks, if it were some low-level peon like you or me, we'd have gone straight to jail, do not pass Go, do not collect $200. But she probably won't be indicted; which is the ultimate example of "white privilege" in our country, but you won't hear anyone saying that about her.