The data transfering process and the interface circuit design are mainly introˉduced in this paper.

It includes two parts: transmitting and receiving.

Aimed at the phenomena of unsuccessful transmitting the encrpytion mes sage of 14h and 20h recent in Jinzhong bureau, the method of trouble processing of municipal up encrpytion message were proposed by examining and installing ope rational software, configuration files and node machine.

Implement of SMTP Protocol on Mail Sending Client Based on WINDOWS Environment;

The main work is focused on the realization system of integrating sending unit with receiving unit and the improvement of the anti- interference capability as well as the redundancy method.

By analyzing and studying the problems of introducing communication components sending and receiving communication data,the paper explains the basic method and technique of using serial communication componens in Visual C++,on the basis of this practical programming code is given.

In view of the messages which are not Latin letters and text occurred in email transmission,the paper gives a solution,called MIME,which only needs to change transmitting program and receiving program,and also introduces two encodedecode methods,QuotedPrintable and Base 64,and their advantages and disadvantages,which will results in relatively new encodedecode method.

In universities,the at the end of semester student result table sends by letter is one arduous duty,not only the work load moreover is greatly easy by the letter transmission way to make a mistake,In order to reduce the work load and the mistake,this article will explains how to use Visual Basic language, gets some data in database,makes content of E-mail,and uses Microsoft MAPI6.

After giving the message traffic module, the title introduced the message sending and receiving mechanism in Linux IP networking carefully.