關鍵字：私有網域名稱系統、電子郵件、SMTP協定、PDMA系統、多國語言 The Domain Name System that we use to identify host address on Internet nowadays is not suitable for applications over private domain. Hence, a new architecture called Private Domain Name System (PDNS) has been designed and produced to support applications of private domain. But, there is not any Email solution on PDNS architecture; in other words, all private domains on PDNS architecture can’t send Email to each other. This thesis points out the difficulty and restriction of send/receive Email which has private domain name (ex. use non-English languages) using current Email technology, and try to find a way compatible with current Email environment and let people no need to change original behavior and can send/receive such special Emails. At last, this thesis will design and offer a complete Email solution which is base on TCP/IP network and use SMTP protocol as Email transmission standard for user can send/receive Email that is using private domain name. In the solution, a new system called PDMA has been developed to connect Mailbox server, PDNS system and the client MUA s/w in the all mail system structure, responsible for the main Email transmission work. If any error happened during the Email transmitting, PDMA will send NDR (Not Delivery Report) to original Email sender. In order to support using non-English language Email address, this thesis also provides Mailbox server function for PDMA to store such special Email address to user mailbox file. In order to enable PDNS system to support PDMA to transmit the Email, this thesis also increases and develops two new functions on PDNS system. The solution provided by this thesis let network administrator dispose the Private Domain Mail System well fast under the environment of existing network; Let users no need extra education or training, can read/write/receive/send Private Domain Email easily; people also can utilize the theory in this thesis to implement Email address witch is defined by themselves, even if the Email address is defined with non-English languages, so Multi-Language Mail System can be implemented by the theory of this thesis. At last the implementation of "Chinese address Mail System" is provided to make an example for needing unit for referential use.
