Abstract: A method performed by at least one computer processor of a message delivery system includes generating a mapping among registry identifiers, destination identifiers, and preferred transmission methods of a plurality of users. Each user's destination identifier is associated with at least one delivery address for receipt of electronic package transmissions by the respective user. An outbound delivery request is received and includes a specified destination identifier for delivery of an electronic package. If the specified destination identifier is included in the mapping table, the mapping table is used to identify, based on the specified destination identifier, a preferred transmission method for transmitting the electronic package. The electronic package is transmitted using the preferred transmission method.

Abstract: Nested email delivery substitutes a control token into an recipient email address, and uses the result as the username in email to a domain of a secure processing server. At the secure processing server, the recipient email address is extracted, control token identified, and any attachments processed and delivered based on the control token. The secure processing server may be an internet-based secure fax server and attachments processed as native documents for high-resolution, color faxing. Delivery may also be via certified email, or native documents may be processed into workspace storage or through other configured processing. Multiple tokens may be combined to trigger multiple actions.

Abstract: A system for securely transferring an electronic package from one user to another includes a mechanism for requiring payment from the recipient of an electronic package before the recipient is permitted to receive the package. The sender of an electronic package may specify one or more files to be included in the package, one or more recipients of the package, and an amount of a required payment. Each recipient is notified of the electronic package and prompted to provide payment. The system permits each recipient to download the electronic package only if that recipient provides the required payment. The sender may specify a different payment amount for each recipient. The sender may add, delete, and modify files within the package over time. When a recipient downloads the package, the files that are within the package at that time are provided to the recipient.