Communication system for electronic messages

A communication system for electronic messages, comprising:

• a plurality of data processing devices, each data processing device comprising a central processing means, storage means, input means and display means;
• a data network for data transmission of electronic messages, controlled by the central processing means of a first data processing device, to a second data processing device;
• wherein
• an electronic message includes data blocks;
• the central processing means of the second data processing device analyzes the electronic message and stores the data blocks, included in the electronic message, in the storage means and displays or reproduces the data blocks, as controlled by the input means;
• an assignment data block is included with the transmission of the electronic message, including at least one assignment instruction specifying an assignment between a first data block or data segment and at least one second data block or data segment of the electronic message;
• the central processing means, of the second of data processing device, parses the electronic message into respective data blocks using indicator data sequences, and stores said data blocks in respective storage means;
• and
• the central processing means, of the second of data processing device, analyzes said assignment data block and, based on the analysis, generates a list of assignments between storage locations in which data blocks or data segments of the electronic message are stored.