计算机毕业设计 论文_基于VB_电子邮件系统

第一章概述 (3)

1 邮件的概念、意义 (3)

1.1 什么是电子邮件 (3)

1.2 电子邮件发展历史 (3)

1.3 电子邮件发展历史年表 (3)

2 当今电子邮件的情况以及发展趋势 (8)

2.1 从另一个方面看电子邮件 (8)

2.1.1 垃圾邮件 (8)

2.1.2 邮件病毒 (8)

2.2电子邮件发展趋势 (9)

第二章系统的理论基础以及技术支持 (10)

1 电子邮件系统有关协议 (10)

1.1 RFC822邮件格式 (10)

1.2 SMTP简单邮件传输协议 (10)

1.3 POP3邮局协议 (10)

1.4 IMAP4网际消息访问协议 (10)

1.5 MIME多用途的网际邮件扩展 (10)

2 VB的会话控件和消息控件 (11)

第三章系统地分析与设计 (11)

1 设计思想 (11)

2 功能设计 (12)

3 系统开发与运行环境及编程语言 (12)

3.1 系统开发环境 (12)

3.2 系统运行环境 (12)

3.3 编程语言及开发工具的选择 (12)

3.4 模块设计和功能实现图解 (12)

3.5 变成实现过程 (12)

3.5.1 主界面 (14)

3.5.2 邮件发送程序 (16)

3.5.3 邮件接收程序 (17)

3.5.4 邮件附件 (19)

3.5.5 软件信息窗口 (21)

3.6 系统的运行和调试 (21)

第四章系统总结 (21)

1 主要功能及特点 (21)

2系统存在问题及改进方向 (21)

主要参考文献 (23)

当今世界电子邮件已经是网络生活中不可或缺的，相信每个认知网络的人都会有一个或多个自己的电子邮箱，人们通过电子邮件进行通信和交流，许多商家和组织机构也用电子邮件进行各种商业活动和业务联系，毫无疑问，电子邮件已经逐渐开始取代普通的信件，成为为主流的信件交流工具，带来的就是电子商务的发展。

VisualBasic6.0是微软开发的一款面向对象的程序设计语言，被广泛的应用各种系统应用程序的开发。VB有灵活，高效，易用，功能强大的等特点，所以用VB来编写电子邮件收发系统很合适。邮件收发系统是个人软件，利用个人电脑的outlook终端进行网络会话，相对的又比outlook邮件系统简单实用。当今网络上邮件系统多不胜数，几乎全是基于Web服务器的asp系统。用vb编写邮件系统没有Web服务器支持，所以不能像网络上那样有华美的画面和各种多媒体功能，用vb编写的只是一个邮件客户端。相比较而言，拥有的确是简洁实用和方便快捷，大大提高了我们的工作效率，节省了我们的时间。

ChienSays

The now world E-mail has been person who network life the inside is necessary, believing each perception network to there will be an or many a letter for own electronics mailbox, people passing E-mail proceeding correspondence with exchanges, many company's houses with organizing organization too using E-mail proceeding every kind of business activity with business contacting, beyond all doubtly, E-mail already and gradually starting replacing common letter, becoming for main current exchanges tools, bring of is the development of the electronic commerce.

VisualBasic6.0 is development that a procedure design language of the Microsoft development that face to the object, wasing applied the procedure by extensive and applied every kind of system.The VB has vivid, efficiently, use easily, mighty etc. in function characteristics, so use the VB to weave to write the E-mail receive and dispatch the system very fit.The mail receives and dispatch the system is an outlook terminal personal software, making use of the personal computer to proceed the network conversation, opposite again more simple than outlook mail system practical.Mail system many extremely numbers on the now network, the almost all is the system of asp to base on the server of Web.Write with the vb plait the mail system have no the server of Web supports, so can't resemble there is so fine appearance on the network with every kind of multi-media function, use vb the plait write of just a mail the customer pare than but speech, own is really Chien's 洁practical ising fast with the convenience, increases consumedly our work efficiency, saved our time.