Message automatic notification system, message automatic notification method, communication terminal device, and recording medium

摘要

A message automatic notification system sends a message via a communication network to at least another communication terminal devices registered in a communication terminal device. The communication terminal device includes a control circuit, a communication circuit, and a memory unit. The control circuit causes a message-sending condition to be registered in the memory unit, obtains presence information from the other communication terminal device registered in the memory unit via the communication network, judges whether the message-sending condition where a message is sent when the presence information turns to be a predetermined state is established based on the presence information obtained, and sends a message previously registered by a user in the memory unit when judged that the message-sending condition is established.