Mail Server For Research And Development

The main content of this thesis is the development of the mail server, and the system can meet the actual need of Xichang College, and also meet the requirement of some small and medium-sized enterprises. And the mail server is designed and developed strictly according to RFC821 and RFC822 specification. And we use C/S structure as its architecture. We use cross-platform Java as programming language to ensure the system's portability.To ensure the realization and Practicability of the system we make some control and development as follows:1. Use design skill of web server. The processing of mail use independent Multi-Threads Technology to reduce the cost of process set up.2. Divide the system into different subsystem. One answers for receiving out mails. One manages the mail which will be sent in cache pool. One sends mails to remote hosts or local users.And we link all of subsystem using several cache pool.3. Each sub-system use independent thread pool to advance the throughput rate. And the Administrator can the size of the thread Pools according to the real need.4. Use RDBMS as the storage of mail. Boost processing mail ability by means of accessing mail by creating related tables. And we use optimizing technology when querying and database pool technology to advance efficiency.5. To ensure the security of the mail system we design it only to transmit mail of local users, and it will avoid sending spam by persons out of our unit.