The main objective of this system is to keep the organizational data secure and confidential. Using normal mailing system the exchange of the data resides at the third party server. The Intranet Mailing System is applicable within an organization only. In this fast growing world where every qualified person is in urgent need of a job, they join places, working at odd times. The organization has shift times and it becomes difficult for an employee of the shift to communicate with another employee of a different shift. The organizational mailing system can implement to organization such that the database resides with the organization head where as normal mailing system database resides at the third party side, where there is a chance for the third party to view the data. In this mailing system the database resides at the organization head. So that the data is secured for providing security to the data while traveling through the network RSA algorithm is implemented, this is a very secure. In this mailing system every employee has his own user id and password through which he can login and communicate with other employees as well as with the admin also.