Patent ID: 8260866

Claim:
An image transmission system that includes a server and an image transmission apparatus as a client which are connectable to each other, the server comprising: a first electronic storage configured to store therein a recipient-configuration address book containing an identifier and an address of a user registered by the user, the address being a destination of image data for the user where the user wishes to receive the image data, wherein the address of the user in the recipient-configuration address book contains protocol information that shows a communication protocol corresponding to the address of the user; a second electronic storage configured to store therein per-sender address books each registered by a different one of senders of image data and including identifiers and addresses of destinations registered for the corresponding one of the senders; an accepting part configured to accept registration of a user into the recipient-configuration address book; a judging part configured to, when the accepting part accepts the registration, judge whether the user whose registration has been accepted in the recipient-configuration address book has been registered as a destination in any of the per-sender address books in the second electronic storage; and a setting part configured to, when the judging part judges affirmatively, set a notification flag for each per-sender address book for which the judging part judges affirmatively to show that the user has been registered in the recipient-configuration address book, and, when the judging part judges negatively, not to set the notification flag for each per-sender address book for which the judging part judges negatively; and the image transmission apparatus comprising: a login part configured to accept a login of a sender; an acquisition part configured to acquire, from the server, one of the per-sender address books that corresponds to the sender; a notification part configured to notify the sender, of the identifier of the user registered in the recipient-configuration address book if the notification flag has been set to the acquired per-sender address book; and a transmitting part configured to, when a use of a registration content is allowed, transmit the image data to the address of the user registered in the recipient-configuration address book based on the protocol information contained in the address, and when the use of the registration content is not allowed, transmit the image data to the address of the user based on a communication protocol designated in the per-sender address book corresponding to the sender.