IMAGE TRANSMISSION APPARATUS, IMAGE DATA ACQUIRING APPARATUS, IMAGE DATA TRANSMISSION METHOD, PROGRAM FOR IMPLEMENTING THE METHOD, AND STORAGE MEDIUM FOR THE PROGRAM

An image data transmission apparatus which are capable of improving reliability of log files by ensuring proper storing of log information about transferred image data. A preceding log, which includes information about the transmission of image data, is transmitted to a log file server connected with a scanner via a network. In the scanner, it is determined whether the log file server has succeeded in receiving or storing the preceding log. If the log file server has succeeded in receiving or storing the preceding log, the image data is transmitted to a designated destination of image data transmission.