Operation load of a user during transmission of image data with an electronic mail is reduced by automatic cooperation of an information processing apparatus and a portable terminal. In a case where the electronic mail function is selected by a user, the information processing apparatus (2) transmits a command of activating an address book application to the portable terminal (3), and acquires a transmission destination address and a user address from the address book application that is activated in the portable terminal (3). The information processing apparatus automatically creates the electronic mail (9) in which the transmission destination address is set to the transmission destination of the electronic mail, and the user address is set to the transmission source of the electronic mail (9). The information processing apparatus (2) transmits the image data (8) in a state of being attached to the electronic mail (9).