An image sending system including a server and a plurality of image sending apparatuses. The server (i) receives sending method specification information specified by a receiver and indicating a sending method for image data addressed to the receiver, (ii) records the sending method specification information and an identifier of the receiver in association with each other, (iii) and receives updated sending method specification information and rewrites the recorded sending method specification information with the updated sending method specification information. Each image sending apparatus (i) receives a selection of an identifier of a receiver of image data to be sent, (ii) obtains from the server the recorded sending method specification information and identification of the receiver, and (iii) when the identifier of receiver in the received selection matches the obtained identifier of receiver, sends the image data 505 by the sending method indicated by the obtained sending method specification information.