electronic mail from a terminal device a transfer destination determining unit 2 for determining a transfer destination of the electronic mail a data transfer unit 3 for transferring the electronic mail to the transfer destination via a network a bypass processing unit 4 starting a bypass process when an error occurs in the data transfer a re sending destination determining unit 5 for searching for an address of a bypass destination from a database and setting it and a data bypass transfer unit 6 for bypass transferring the electronic mail then the transfer destination determining unit 2 and the re sending destination determining unit 5 are accessible to databases d a each of these function units 1 to 6 is actualized by a program of an information processing apparatus configuring the server and is actualized in a state where a central processing unit cpu of the server is executable of the program stored on for example a hard disk apparatus sequentially reading it through a memory further the database is stored within the hard disk device and is stored with list data of a mailing list as shown in fig2 that will be described later on in fig2 notations of a user 1 a user 2 represent individual addresses for identifying users serving as final destination or individual addresses for identifying terminal devices corresponding to the users note that the transfer destination determining unit 2 the re sending determining unit 5 the data transfer unit 3 and the data bypass transfer unit 6 are separately constructed in terms of a necessity of explanation and may also be integrated by a single construction moreover as.