Connection detection of a device through a relay device and transmission of information to that device

摘要

A relay device (20) is disclosed, which can enable push type services suited to a network. The relay device (20) includes a connection detection section (201) that detects a mobile device (30) that is in a state in which the mobile device (30) can transmit/receive information through a mobile communication network (1), and a notification transmission section (202) for transmitting a result of the detection to a mail server (10) that transmits mail information to the mobile device (30).