US Patent 7512657 Message transmission and reception controlling system

A message transmission and reception controlling method is provided which is excellent in certainty, reliability and confidentiality and in which the situation of a message as transmitted can always be confirmed by each of the sender and the addressee. Message property information H is generated from the message M to define the message M in correspondence with the user who transmits the above described message M and the user who receives the message M. The user can receives the message body information C as defined in the message property information H by browsing the message property information H. The message property information H belonging to the user as the sender and the message property information H the user as the addressee are updated in synchronism with the access to the message body information C so that it is possible to confirm the message transmission and reception situation of the message body information C by browsing the message property information H.