A facsimile apparatus transmits facsimile data converted from e-mail data to a facsimile destination via a public communication network. A receiver receives the e-mail data from a requesting node. A memory stores a password and a domain name of a requesting node. An acquiring section acquires a destination address including at least a telephone number, a password and a domain name, from the requesting node. A converter converts the e-mail data into facsimile data. A comparator compares the password and the domain name acquired by the acquiring section, with the password and the domain name stored in the memory, respectively. A facsimile transmitter transmits the converted facsimile data to the facsimile destination designated by the telephone number when a result of the comparison indicates that the password and the domain name acquired are the same as the password and the domain name stored in said memory. Further, when a result of the comparison indicates that the password and the domain name acquired are not the same as the password and the domain name stored in the memory, the facsimile transmitter does not transmit the facsimile data to the facsimile destination.