The “business correspondence system” that developed during the history of global telecommunications was not set up in Hungarian telecommunications. This represents a major disadvantage in global communication, both in the business world and in the official European and global connections of government administration. The international standard of business correspondence systems is the X.400, which offers more secure and traceable electronic correspondence and basically represents the foundations of official electronic correspondence. In its absence, it is difficult establish official “registered” and “return receipt” electronic correspondence in Hungary . Abroad, however, this secure correspondence systems is widely used in EDI connections for the transmission of EDI messages. The automatic “enveloping” of EDI messages into X.400 correspondence is ensured by a separate international standard, the X.435. For addresses it likewise uses a far more guaranteed method than DNS, namely the X.500 standard. The communications requirements of foreign partners of our clients frequently include the existence of an X.400 connection. (the keywords in this are the X.400 addresses, such as: C: ADMD: PRMD: O: OU: G: S:) In line with these requirements we also offer an X.400 service through our own fleet of devices, with direct connection to international networks.