Concerns over Malcolm Turnbull using his own private email server have been rebuked by the Australian Prime Minister, who said that all parliamentarians use insecure communication methods all the time, most notably, SMS messaging.

"Classified information can only be exchanged through government systems," Turnbull said in a Friday press conference. "Obviously, all members and senators, and ministers, use non-government forms of communication ... for matters that are not classified, that are routine and non-sensitive."