A disclosed multifunctional input/output device has an e-mail client function for sending/receiving e-mails to/from a mail server. The multifunctional input/output device includes a storing unit configured to store a first e-mail acquired from the mail server; a printing unit configured to print the first e-mail stored by the storing unit onto a print medium and to add code information to the print medium, wherein the code information is obtained by encoding a source e-mail address of the first e-mail; a reading unit configured to read the code information printed onto the print medium by the printing unit; and an e-mail sending unit configured to send a second e-mail to the source e-mail address acquired from the code information read by the reading unit.