PROBLEM TO BE SOLVED: To improve the flexibility of the selection of the distribution destination of an electronic mail, and to make the maintenance management of a data base simple.
SOLUTION: An electronic mail transmitter prepares a mail in which designation information and retrieval reference value of a data base retrieval system are included in a mail address. A mail distributing system 1 for performing data management based on a hierarchical name space analyzes an address part attached to the electronic mail. The group of electronic mail addresses is obtained as the destinations of distribution by using a rule base 5 in which a rule for calculating the group of the mail addresses from a relation data base, and referring to a data base 9 in which personal information is managed. A DB front end 7 and an update processing system 11 automatically collect the personal information through the Internet, and execute the processing of the addition, erasure, and change of the data of the data base 9.