The invention provides a internet facsimile apparatus of a communication apparatus that selectively attaches or does not attach various transmission information (header information) according to receivers. When a user set a read medium on an image reading unit, a receiver's mail address input through a control panel is checked. When the input receiver's mail address does not have the same domain name as the internet facsimile apparatus and is not the mail address for which non-attachment of the transmission information is preset, the transmission information is attached, via the transmission information attaching unit, to a part of the image information obtained by reading the image information formed on the read medium. Then, the read image information is transmitted to the receiver.