A network communication system includes a network processing center for receiving and converting an electronic or electro-magnetically transmissible data/content into a physically deliverable object and/or network transmissible content data files for carrying out a hybrid delivery of the data/content by a physical delivery process and/or a network electro-magnetic delivery process to a recipient or an ECRMA. A machine-readable code such as QR code is used in the continuous information flow among the various components of this system. The unique machine-readable code is associated with multiple kinds of address-linked information, and is also associated with corresponding personally identifiable information and biometric information. The delivery status of the electronic contents and the post-delivery activities are tracked by a variety of mechanisms and the information obtained from the tracking is send back to the content-senders.