A Message Publishing System (MPS) configured to receive a message from a sender, identify the sender as an authorized sender based on information associated with the message in comparison to data in a sender account, store the message, receive a request over the Internet for at least a portion of the message from a requestor and responsively retrieve the portion of the message, and send the portion of the message to the requestor over the Internet. In further aspects of the disclosure, a security module can implement a security scheme with reference to data in the sender account as a function of the format of the message, and the message can be converted from one format to another.