e-mail system selection and structure of the special topic (last article)

This paper analyzes the composition of the mail system, the selection of various parts, system architecture analysis and system security settings, more complete coverage of a mail system design of the whole process, is the enterprise to select or develop the mail system reference. The full text is divided into two parts, the last part includes the selection of the mail system and security analysis, the next chapter is the specific settings of the mail system and test methods.

e-Mail English name is e-Mail, born in the early 70. With the development of Internet application, it evolves into a complex and rich system which can transmit sound, picture, image, document and other multimedia information besides the text information. Today, e-Mail has become a popular way of communication, and gradually become an important means for enterprises and institutions to strengthen information exchange and customer relationship management.

E-Mail has brought unprecedented convenience to the netizens of our country. In China, the rapid development of e-mail applications, the number of free mailbox registration soared. At the same time, the deficiencies exposed by early mail systems are becoming increasingly prominent.

As the number of users increases, the system performance drops rapidly, the system cannot expand conveniently, the capacity of the millions cannot be realized; In a complex environment, the message queues are not robust enough to cause the system to be unstable or even lose mail; The system does not have strong anti-spam ability, which leads to spam; system structure is not fit for today's needs , the security is not high lead to the leakage of trade secrets, the system lacks localization, the interface is unfriendly, installs uses inconvenient, handles many bytes (for example Chinese) frequently to appear the problem, each kind of coding transformation is more difficult, etc., all is the problem which the mail system exists.

To create a suitable internal and external information exchange platform, to facilitate the implementation of self-management, staff and customers convenient communication, communication and collaboration. Therefore, how to choose a good mail system, how to build a powerful, stable performance of the mail system worthy of enterprise attention. In particular, the early analysis, selection work, but also is a very important and necessary steps.

Analysis and selection of the components of mail system

First, a complete messaging system, in addition to the underlying operating system, includes the message transfer agent (mail Transfer agent,mta), the Mail Distribution Agent (mail Delivery agent,mda), and the Mail user agent, MUA) Three functional sections (Figure 1).