According to one of embodiments, taking in facial image data for a user, extracting feature points of the face of the user from the facial image data and then coding the feature points, and registering the facial image data on a destination management table so that the facial image data is associated with a special identifier and/or the coded feature points. In particular, the face of the sender is incorporated into a video mail, so that the exchange of addresses (faces) is facilitated and the reliability of the e-mail itself can be enhanced. Further, a face can be automatically registered on an address book at a receiving end. In this case, a similar face can be updated by the latest face.