| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a communication terminal that can confirm whether or not transmitted electronic mail is received without being excessively subjected to charge imposition. SOLUTION: The communication terminal of this invention that is compatible with electronic mail and the MDN(Message Disposition Notifications) is provided with a means that stores maintenance information of information to be transmitted, a function that registers a specific destination address from which the acknowledgement by the MDN can be expected, and a measurement means that measures a time after mail transmission. In the case of transmitting mail to a destination by using the MDN that makes a specific contract with a service station or the like from which acknowledgement by means of the MDN can be expected, the communication terminal transmits the same contents as those of the preceding mail to the destination when the communication terminal receives no acknowledgement after a prescribed time. In the case of sending a message of mail to a specific opposite party that can respond to the mail by means of the MDN, the communication terminal checks the acknowledgement from the opposite party by means of the MDN. Since the communication terminal retransmits the message when receiving no acknowledgement even after a prescribed time, the communication terminal can enhance the surety of message transmission even when using the electronic mail.</p> |
