The US financial authority does not consider Internet email secure, but is encouraging the public to use it to report insider trading.
The Securities and Exchanges Commission (SEC) has opened 13 email boxes for the public to report violations of federal securities law, find information, complain about competitors, ask questions about the SEC and even comment on SEC rulings.
In a statement, the SEC admitted: "Because electronic mail on the Internet is not secure, you should not send confidential or sensitive information. Further, responses sent over Internet email are not considered statements of SEC policy or Commission opinion."
The SEC confirmed it will only accept formal filings sent by post but will investigate instances of alleged fraud or unauthorised stock trading when sent in via email.
IBM and Technical University of Munich team demonstrate how Shor's algorithm, which can't be cracked by conventional computers, can be solved quickly with quantum computing
Hubble Space Telescope finds superflares from young red dwarfs could strip away planetary atmosphere
Younger stars are 100 to 1,000 times more energetic than when they're older
Two of the big four supermarkets will use the system to control sales of restricted products
PUBG news and updates: November's Update #23 to bring new Skorpion pistol and changes to blue zone visibility
Genuinely useful side-arm coming to PUBG in Update #23