Abstract: The E-mail distribution system which will be distributed to each addressee in a mail server after adding a transmitting person's job administrator to an addressee automatically if an E-mail is sent from the terminal of a computer network system built in the organization. This E-mail distribution system possesses the automatic reading means which comes to have an individual data control area, an organization data control area, and an addressee addition program in the mail server. In this individual data control area, personal information, such as its affiliation post, job class, and an e-mail address, is memorized. In this organization data control area, organization information, such as its post and job class, is memorized based on this personal information. If an E-mail is sent, this addressee addition program will specify a transmitting person's job administrator from an individual data control area and an organization data control area, and will appoint him to be a new addressee.