Design And Implementation Of E-Mail System Of Taizhou College Of Nanjing Normal University

With the development of the Internet, email has become one of the most popular applications on the Intemet and it is also one of the most commonly used communication tools. In various ways to accessing email, Web mail is the first choice for most users, a large number of free web-based email service website also arises at the historic moment.Email transmission is carried out by SMTP Protocol(Simple Mail Transfer Protocol, SMTP) which is an email communication protocol. Users can communicated at a very cheap price in a very fast way through various approaches with any people who has Internet access in the world. The basic principle of developing email is to promote communication.A web-based email system is mainly composed of database systems, Web client and mail server. Most current ISP’s Web mail systems adopt the existing UNIX email software, combined with their own Web client implementations. PHP, ASP.NET is the technologies usually used in developing dynamic website. Sendmail, Qmail and other email software on the UNIX platform play huge roles in the management and transfermission of email.From the perspective of the user, in our paper, the design of email system still inherits from the traditional email system architecture in order to ensure usability of our email system. Due to the new architecture design, to enhance convenience, flexibility and easy maintainability of email management, we will give full consideration to our email system. From those who provide service perspective, the new architecture proposed in our paper is distinct, the architecture is simple and has sufficient technical and economic feasibility.At the beginning of our paper, we will expound the basic principle of email, email protocol, and analyze the design pattern and J2 EE architecture of our email system.Then we will give practical analysis of the overall architecture of a Web email system.Our implementation is based on the light-weighted J2 EE specification and we mainly adopt the JSP and Servlet technologies to deal with the development problems. During the implementation and design of the whole project we ues UML diagram to describe behaviors in development.