A control method for controlling an image processing apparatus capable of transmitting image data using any one of a plurality of communication protocols includes holding, in a holding unit, management information for managing a destination of image data to be transmitted and a communication protocol associated with the destination, displaying one or more destination candidates according to a character string entered by a user and the management information held in the holding unit, determining, in a case where a destination is selected from the one or more displayed destination candidates, a communication protocol associated with the selected destination according to the management information held in the holding unit, and transmitting the image data to the selected destination via the determined communication protocol.