1. An image processing apparatus connected to a delivery server storing a predetermined electronic data via a network, the image processing apparatus, comprising: an image forming apparatus configured to read a document to generate image data, the image data being generated in a first format; a workflow selector configured to select a desired one of workflows using the image data, each of the workflows indicating a selected sequence of operations for processing the image data, the selected sequence of operations including at least one desired delivery type for delivering the image data, the selected sequence of operations including a first operation for converting the image data into a desired format and a second operation for converting electronic data into the desired format; a data selector configured to, receive identification information, and specify electronic data to be delivered together with the image data based on the received identification information, the specified electronic data being in a second format, and restrict a selection of the electronic data based on restriction information, the restriction information indicating that at least a portion of the electronic data is to be restricted based on the selected one of the workflows, and in restricting the selection of the electronic data, the data selector is configured to restrict the at least a portion of the electronic data from being displayed on an electronic data display screen based on the restriction information; and a transmitter configured to send to the delivery server the specified electronic data, the image data, and a request for processing the selection of the electronic data, and the image data based on the selected one of the workflows, as delivery setting information for processing electronic data stored in the delivery server and image data generated by the image processing apparatus based on the selected one of the workflows, the delivery server using the delivery setting information to perform the selected sequence of operations including the first operation and the second operation according to the selected one of the workflows.