A communication system and method transmits electronic mail among multiple users that are senders or recipients of the mail, or both. The system and method use and augment the Internet with a postal server and software linked to the Internet. The sender and recipient have terminals also linked to the Internet. The sender uses postal sender software to select transmission with certain premium services. The system and method include payment and accounting functions for use of the premium services. The system and method can operate with plural postal servers at one or more locations. Communications can utilize the postal server and software only for processing data about the message and/or its transmission. Communications among the Sender, Recipient, and postal server can create virtual intranet-like qualities. Transmitted electronic mail uses message data to identify the Sender, authenticate and verify the email, and direct its processing.