To reduce the load imposed on both transmission and reception systems and to perform quick data transmission and reception by making it possible to transmit and receive an attached file without performing encoding processing.

This Internet facsimile apparatus 10 has a mail editing part 106 for preparing e-mail with an attachment file made of binary data attached thereto, a response receiving part 108 for receiving receivable information indicating that the binary data can be received from an Internet facsimile machine 20, and a mail transmitting part 110 for transmitting the attachment file as binary data when receiving the receivable information.