A cellular phone device stores mail information related to an electronic mail exchanged with a communication network. A communication unit is configured to connect with the cellular phone device via a wireless communication. Immediately after connection of the wireless communication between the communication unit and the cellular phone device, a receiving unit receives specific mail information among mail information stored in the cellular phone device. The specific mail information is related to an electronic mail exchanged in a time period between previous disconnection from the cellular phone device and present connection with the cellular phone device.