  Using multi group asymmetric public and private keys, this paper proposes a
encryption email communication system, which makes email communication more
secure, lowers the service provider\'s network and storage consumption, and
completely eliminates any spam. Prior to this, PGP (Pretty Good Privacy)
partially solved the encryption problem, but it only encrypts the content of
the mail. We would also expect a mail system to provide safe and reliable
services, completely eliminate the spam emails, reduce the consumption of
service provider\'s traffic and storage resources, and specially focus on
protecting the user privacy and the data security of service provider.
