Whoever approved her email for the BlackBerry had to know that she was using a non-secure server and should have looked into the matter.
Then again, there never seems to be any serious investigations of the Clinton Crime Syndicate.
It’s not known if Clinton’s private email was whitelisted or not. This is the last paragraph of the article I linked to:
“Asked if the President’s BlackBerry was configured to accept the clintonemail.com address, a spokesperson for the Secret Service referred questions to the White House Communications Agency and the White House Military Office. Fox News is attempting to follow up with both.”
Isn’t it also odd that the POTUS and his staff did not question why clearly sensitive information coming from Hillary was not only from a .com domain but also did not have any classified markings?