To reduce the communication charge by shortening the time and reducing the cost from direct mail generation to direct mail transmission.

At a direct mail transmission request from a company user terminal 10, an electronic mail service center 40 retrieves general users meeting transmission destination conditions from pieces of personal information registered in a database and automatically sends a direct mail to corresponding general user terminals 20. When the direct mail is in questionnaire form, questionnaire results are received from general user terminals 20 and totalized, and the totalization result is sent to the company user terminal 10. When electronic mail addressed to a registered user is received after the registered user sets electronic mail reception conditions, the electronic mail is sent to the registered user terminal 30 on condition that the electronic mail reception conditions of the registered user are met, but the transmission of the electronic mail addressed to the registered user is reserved in other cases.