An image processing apparatus includes a facsimile communication unit; a mail communication unit; an outputting unit; an external power source processing unit to operate the image processing apparatus using external power supplied from an external power source; a power-storing source processing unit to operate the image processing apparatus using stored power stored in a power-storing unit; a power source detection unit to detect whether the apparatus is operated with the external power or the stored power to output a detection result; and a facsimile data output control unit to transmit, when the facsimile communication unit receives facsimile data, the facsimile data to a destination address via e-mail with the mail communication unit based on the detection result indicating that the stored power is supplied, and to output the image of the facsimile data based on the detection result indicating that the external power is supplied.