Prime Minister John Key says he tends to use a private email address, despite the fact that Foreign Minister Murray McCully had a private email account hacked into.
Mr Key confirmed yesterday that the hacking occurred in April last year.
But he said Mr McCully's office had advised him that there had been no classified material on the private email address.
Mr McCully told the Dominion Post he discovered the breach when people started receiving emails from the Telecom Xtra account making fun of himself.
It had been closed down.