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月10 日
Web Mail收发系统设计与开发
摘 要
互联网络技术的不断发展,电子邮件服务已经成为人们基本的信息交互手段,也是网络服务中最早和最基本的服务之一。传统邮件系统大多是基于C/S结构,如Lotus notes、Microsoft Exchange Server等,这些邮件系统占用相对较多的服务器资源,对服务器性能有更高的要求,同时也增加了管理负担。并且,由于不同服务器需要特定的客户端软件,增加了系统的开发和管理成本。
基于Web的邮件服务提供了更快捷、高效的服务,使得新一代的Web Mail能解决传统邮件的不足之处。本文设计并实现的邮件收发系统基于B/S模式,以组件技术为基础,利用System.Web.Mail命名空间构造函数,分别调用Mailmessage,Mailattachment和SMTPmail方法,实现以Web网页的形式收发电子邮件,用户只需要通过Web页面就可以实现带附件邮件的发送。
本论文分为四个部分,分别是:一、选题意义及系统构成;二、介绍邮件收发系统的工作原理、优缺点及开发环境;三、程序编码及页面设计; 四、对Web邮件系统进行测试并获得测试的结果。
关键词: Web Mail;ASP;SMTP协议;POP协议
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 录
论文总页数:17页
1 引言 1
1.1 选题意义 1
1.2 基于C/S模式邮件的运行机理 1
1.3 邮件的发送和SMTP服务器 2
1.4 邮件协议及原理 2
1.5 SMTP简介 3
1.6 SMTP的运行过程 4
1.7 SMTP中继服务的设置 4
2 总体分析 4
2.1 工作原理 4
2.1.1 单域网络下的单Web 邮件服务器系统 4
2.1.2 多域网络下的单Web邮件服务器系统 5
2.1.3 多域网络下的多Web邮件服务器系统 5
2.1.4 将内部网络的电子邮件发