Gmail users have no "reasonable expectation" that their emails are confidential, Google has said in a court filing.
Consumer Watchdog, the advocacy group that uncovered the filing, called the revelation a "stunning admission." It comes as Google and its peers are under pressure to explain their role in the National Security Agency's (NSA) mass surveillance of US citizens and foreign nationals.
"Google has finally admitted they don't respect privacy," said John Simpson, Consumer Watchdog's privacy project director. "People should take them at their word; if you care about your email correspondents' privacy, don't use Gmail."