To provide a network fax apparatus, which can limit requests for printing, transmission, relay or the like from fax apparatus of another network, and the printing and fax transmission request from other network terminals for every user.

The network fax apparatus having a function to carry out fax communications using a general public line and a LAN interface function and adaptable to a computer network that enables a user to send and receive the fax information by the electronic mail, is provided with a table to limit executable functions for each addressee in its own apparatus (e.g. in a system memory 12).