Web Mail 收發(fā)系統(tǒng)設(shè)計與開發(fā)

論文字?jǐn)?shù):9242,頁數(shù):21

摘  要
互聯(lián)網(wǎng)絡(luò)技術(shù)的不斷發(fā)展，電子郵件服務(wù)已經(jīng)成為人們基本的信息交互手段，也是網(wǎng)絡(luò)服務(wù)中最早和最基本的服務(wù)之一。傳統(tǒng)郵件系統(tǒng)大多是基于C/S結(jié)構(gòu)，如Lotus notes、Microsoft Exchange Server等，這些郵件系統(tǒng)占用相對較多的服務(wù)器資源，對服務(wù)器性能有更高的要求，同時也增加了管理負(fù)擔(dān)。并且，由于不同服務(wù)器需要特定的客戶端軟件，增加了系統(tǒng)的開發(fā)和管理成本。
基于Web的郵件服務(wù)提供了更快捷、高效的服務(wù)，使得新一代的Web Mail能解決傳統(tǒng)郵件的不足之處。本文設(shè)計并實現(xiàn)的郵件收發(fā)系統(tǒng)基于B/S模式，以組件技術(shù)為基礎(chǔ)，利用System.Web.Mail命名空間構(gòu)造函數(shù)，分別調(diào)用Mailmessage,Mailattachment和SMTPmail方法，實現(xiàn)以Web網(wǎng)頁的形式收發(fā)電子郵件，用戶只需要通過Web頁面就可以實現(xiàn)帶附件郵件的發(fā)送。
本論文分為四個部分，分別是：一、選題意義及系統(tǒng)構(gòu)成；二、介紹郵件收發(fā)系統(tǒng)的工作原理、優(yōu)缺點及開發(fā)環(huán)境；三、程序編碼及頁面設(shè)計； 四、對Web郵件系統(tǒng)進行測試并獲得測試的結(jié)果。

關(guān)鍵詞： Web Mail；ASP；SMTP協(xié)議；POP協(xié)議
Design and Implement of Web Mail System
Abstract
With the development of the Internet technology, mail service has been a basic mean of information communication, which is also one of the earliest and the most basic services of the Internet. However, traditional mail services is based on client and server, for example, Lotus notes, Microsoft Exchange Server, which have used more resources of the server, thus, affect the capability of server and need high performance of server. Meanwhile, each server needs special client, which increases the cost of developing and managing the system.
 Based on Web mail server system provides faster, more efficient Web mail services, with the strong capability, the new generation of the Web mail can change the disadvantage of the traditional mail. This paper designs and implements a Web mail receiving-sending system, which is based on browser and server as well as components technology, sending mails through Web and users can use it to send mails with attachments.
This paper is divided into four main modules, respectively are First, introduction the background of the selecting the topic as well as the constitution of the system; Second, introduction of work principle, superiors and inferiors and the developing environment of the mail sending-receiving system; Third, introduction of the code procedures and design of the Web page; Last, test of the mail system and the result of the test.

Key words: Web Mail; ASP; SMTP protocol; POP3 protocol

目    錄

1  引言 1
1.1 選題意義 1
1.2 基于C/S模式郵件的運行機理 1
1.3 郵件的發(fā)送和SMTP服務(wù)器 2
1.4 郵件協(xié)議及原理 2
1.5 SMTP簡介 3
1.6 SMTP的運行過程 4
1.7 SMTP中繼服務(wù)的設(shè)置 4
2 總體分析 4
2.1 工作原理 4
2.1.1 單域網(wǎng)絡(luò)下的單Web 郵件服務(wù)器系統(tǒng) 4
2.1.2 多域網(wǎng)絡(luò)下的單Web郵件服務(wù)器系統(tǒng) 5
2.1.3 多域網(wǎng)絡(luò)下的多Web郵件服務(wù)器系統(tǒng) 5
2.1.4 將內(nèi)部網(wǎng)絡(luò)的電子郵件發(fā)送Internet 5
2.2 IIS WEB郵件發(fā)送的特點 5
2.3 IIS WEB郵件發(fā)送的不足 6
2.4 IIS WEB環(huán)境建立 6
2.5 開發(fā)環(huán)境 6
3 程序的設(shè)計與實現(xiàn) 6
3.1 SYSTEM.WEB.MAIL命名空間介紹 6
3.2 程序設(shè)計主要步驟 7
3.3 界面設(shè)計 7
3.4 主要代碼 12
4 軟件測試 14
結(jié)　  論 15
參考文獻(xiàn) 15
致    謝 16
聲    明 17