There is provided a data transmission apparatus, an image processing apparatus and a program, capable of preventing data from being transmitted to a destination to which the data should not be transmitted, in the case where there is a possibility that the data is forwarded to a destination other than the destination designated at the time of the transmission. When an address designated as a transmission destination has a possibility that data is forwarded to another address, such as an address of a mailing list, a forward destination information determining/acquiring unit acquires the information of the forward destination. When the forward destination includes the address that does not correspond to the transmission-permitted address held in a transmission-permitted address holder unit, an e-mail transmission canceling unit cancels the transmission to the address to which the transmission is not permitted.