In communication services on networks, such as telephone, e-mail and IP telephone, it is necessary for each user terminal to prenotify the communicating party of its own address such as telephone number, mail address, SIP URI (Session Initiation Protocol Uniform Resource Identifiers), or IP address. These various addresses will hereinafter be referred to simply as an address.
In communication services, address notification devices have heretofore been used by which user terminals exchange their own addresses.
For example, there has been proposed a system in which the transmitting end (a cell phone equipped with a mailing function, for instance) sends a mail message added with its mail address, and when the address attached to the mail message received at the receiving end is unregistered, it is newly registered, and if the address differs in contents from the pre-registered one, it is modified (updated) with the address added to the received mail message (see, for example, patent document 1). Such a configuration allows registration of the mail address or the like without key input, and hence it provides increased operability.
In the above-said prior art, however, when process information is set about processing of communication information to be sent and received, such as acceptance or rejection of the communication information received at the address added to the mail message, and classification and encryption of the communication information, there arises the problem that the process information needs to be changed corresponding to the modification of the mail address (address).
Patent Document 1: JP Application Kokai Publication No. 2002-163204