Abstract: A system for delivering distance learning enables a plurality of teaching sites to be streamed to multiple locations via a network with instant, real time information conveyance and instant interaction between at least one teacher at least one of said teaching sites and at least one learner at least one learning site via video images, audio signals, whiteboard functions, and other text chat messaging and other digital signal modes.

Abstract: The present invention relates to a method of email transmission. In the method, the packaging of transmission data, the setting of access permission of recipient to each sent mail by sender or registered server, and the delivering of title message to recipient, enable a recipient to get a message directly, as appropriate, from sender's storage area, eliminate forwardness between or among servers, hence, avoid the redundant storage of an identical email in network and an email box stacked with maliciously sent mails, improve the efficiency of email transmission and storage, save resources of the entire network, and ensure the security and efficiency of email transmission.