郵件服務器設計與實現(xiàn)

畢業(yè)論文

摘  要
電子郵件是介于書信、電話和傳真之間的電子信息傳送方式，它也是互聯(lián)網上最基本的功能之1。隨著互聯(lián)網的進1步發(fā)展，電子郵件已經成為人們聯(lián)系溝通的重要手段。技術的革新使得電子郵件系統(tǒng)已經演變成1個相當復雜且功能更為豐富的系統(tǒng)，可以傳送聲音、圖片、圖象、文檔等多媒體信息，以至于數(shù)據庫或帳目報告等更加專業(yè)化的文件都可以以電子郵件的形式在網上分發(fā)。隨著信息技術的發(fā)展以及電子郵件系統(tǒng)功能的日益強大，其應用領域已得到較大的拓展�；�于Web的電子郵件系統(tǒng)應用是這些年發(fā)展起來的，網絡的普及使得它得以廣泛的應用。采用開放的Web郵件服務不僅為用戶省去了維護與升級客戶端軟件的麻煩，而且也能夠充分發(fā)揮系統(tǒng)軟硬件資源的作用。Web郵件服務的另1個優(yōu)勢是允許用戶甚至是持有移動設備的用戶，可以隨時、隨地的訪問系統(tǒng)并進行信息傳遞。
郵件服務器主要實現(xiàn)郵件的發(fā)送和接收以及對郵件和用戶的管理。該系統(tǒng)的功能分為3個模塊：（1）通信模塊，用來實現(xiàn)郵件在網絡中的發(fā)送和接收；（2）用戶模塊，用于后臺管理郵件服務器中的郵件和郵箱，可以刪除、添加郵件和刪除、添加郵箱；（3）系統(tǒng)模塊，用來記錄郵件服務器運行時的狀態(tài)。

關鍵詞：電子郵件；B/S；C#.NET；郵件服務器

Abstract
E-mail is a transfer way of electronic information among letter, telephone and fax. It is also one of the most basic functions on Internet. With the further development of Internet, the e-mail has become the important means of people’s connection and communication. The evolution of e-mail system has become very complicated and abundant by the innovation of technology, can convey multimedia information, such as sound, image, picture, file, etc., More specialized files, such as the data base or the account reports, etc. can all be distributed on the net in the form of E-mail. The e-mail system function is strong day by day with the development of information technology; its application has already got greater expansion. This paper is subject to how to build up email system on base browser to servers of application pattern, and study the relevant technology. The application pattern on the Web has developed these years. Popularization of Internet makes it apply broadly. Adopting open Web mail service, user not only have saved trouble of installing software, but also can fully give play to the role of resource of the software and hardware of system. Another advantage of Web mail service is to allow users, even hold users of mobile devices, can visit system and transfer information everywhere any time.
The main functions of the Mail Server are the realization of mail sending and receiving and the management of mail and users. The functions of the system can be divided into 3 modules: (1) The connection module, which is used to realize the sending and receiving of mail in network. (2) The user module, which can be used to delete, add mail or mailbox, then realize the management of mail and mailbox in the backstage of mail server. (3) The system module, which is used to record the condition of the mail server when it is running.

Keywords: electronic-mail; B/S; C#.NET; Mail Server

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