Google has asked a federal court judge at San Jose, California to toss a law suit, which alleges the search engine giant of scanning the content of Gmail users' private email messages, breaching wiretap policies.
The search engine giant argued that the policies allow an 'electronic communication service' to carryout automated scanning in the 'ordinary course of business' to transmit and administer e-mail.
According to Google lawyer Whitty Somvichian, Google can articulate a legal business purpose that frees it from liability under the federal wiretap laws.
Google said in a notion that just as a sender of a letter to a business colleague cannot be surprised that the recipient's assistant opens the letter, people who use Web-based email today cannot be surprised if their communications are processed.
"Indeed, a person has no legitimate expectation of privacy in information he voluntarily turns over to third parties," it added.
However, plaintiffs claim that Google makes use of the content of e-mail messages for its own benefit not related to the service of e-mail and for its profit.
The search engine has also been accused of serving user data over to the US National Security Agency (NSA), together with other tech firms.