SYSTEM, INFORMATION PROCESSING APPARATUS, METHOD OF CONTROLLING THE SAME, AND NON-TRANSITORY COMPUTER-READABLE MEDIUM, THAT MANAGE A PROCESSING FLOW INCLUDING A PLURALITY OF TASKS

An information processing apparatus that manages a processing flow including a plurality of tasks and is connected to an image processing apparatus and a user terminal, the information processing apparatus comprises: an issuing unit which, if the processing flow requested from the image processing apparatus includes a mail-transmission task of transmitting an e-mail with an attached document from the image processing apparatus to the user terminal, issues a mail address in association with the requested processing flow, wherein the attached document is document data to be processed in the processing flow; a setting unit which sets, as a “Reply-To” setting of the e-mail, the issued mail address into the mail-transmission task included in the requested processing flow; and a first transmission unit which transmits the processing flow set by the setting unit to the image processing apparatus.