本文選題：電子郵件 + 郵件服務(wù)器��； 參考：《吉林大學(xué)》2014年碩士論文

【摘要】：電子郵件是—種用電子手段提供信息交換的通信方式,是因特網(wǎng)上最大、最主要的一項應(yīng)用。利用電子郵件系統(tǒng)，用戶可以實現(xiàn)用低價格、高效快速的手段，實現(xiàn)和全球每一個地區(qū)的用戶進(jìn)行溝通。由于它的實用性、高性能及對計算機和通信方面的要求較低，利用電子郵件來交互信息，成為了人與人之間交流聯(lián)絡(luò)的重要方式。 隨著計算機軟硬件的發(fā)展和通信服務(wù)質(zhì)量的提高，郵件系統(tǒng)實現(xiàn)了對電子信函、文件數(shù)字、圖像和數(shù)字化語音等各類型的信息的傳送。與此同時，用戶可方便的獲得很多免費的新聞信息、各種專題郵件信息，實現(xiàn)快速高效的信息檢索，其廣泛的使用改變了傳統(tǒng)的交流方式。電子郵件是在因特網(wǎng)及所有其他的局域網(wǎng)絡(luò)系統(tǒng)間直接面向每個人之間的信息交流系統(tǒng)，其數(shù)據(jù)發(fā)送方和接收方都是每個人，所以極大地滿足了人與人之間的通信溝通的需求。 本文主要介紹了電子郵件服務(wù)器的設(shè)計與實現(xiàn)過程。首先簡單介紹了電子郵件系統(tǒng)的歷史和其國內(nèi)外研究現(xiàn)狀，了解了當(dāng)今電子郵件技術(shù)的發(fā)展水平，并進(jìn)一步提出本文將開展的工作；接著對電子郵件結(jié)構(gòu)、郵件系統(tǒng)的工作原理、簡單郵件傳輸協(xié)議與郵局協(xié)議進(jìn)行了概述，介紹了電子郵件的地址格式和郵件的格式，以及用戶代理、郵件傳輸代理、郵件投遞的程序和郵件的傳輸及其讀取協(xié)議；然后重點介紹了郵件服務(wù)器的設(shè)計與實現(xiàn)，，系統(tǒng)分析了SMTP服務(wù)器和POP3服務(wù)器，對郵件服務(wù)器的總體設(shè)計提出了方案，并進(jìn)行具體SMTP服務(wù)器及POP3服務(wù)器設(shè)計的實現(xiàn)，域名系統(tǒng)訪問函數(shù)的實現(xiàn)，以及郵件投遞函數(shù)的實現(xiàn)；最后對所設(shè)計的系統(tǒng)進(jìn)行郵件服務(wù)器的測試同時指出本論文的不足與可改進(jìn)之處，對郵件服務(wù)器進(jìn)行技術(shù)分析，安全性技術(shù)分析，并論述了郵件系統(tǒng)的發(fā)展趨勢。 因特網(wǎng)上的電子郵件是通過簡單郵件傳輸協(xié)議來傳送的，簡單郵件傳輸協(xié)議主要是規(guī)范發(fā)送方與接送方之間的對話過程。用戶要想從郵件服務(wù)器上取回信件則多采用郵局協(xié)議，它提供了從郵箱中獲取郵件的一組標(biāo)準(zhǔn)機制。本課題所設(shè)計的郵件服務(wù)器支持簡單郵件傳輸協(xié)議與郵局協(xié)議。
[Abstract]:E-mail is a kind of communication which provides information exchange by electronic means. It is the largest and most important application on the Internet. Using email system, users can communicate with users in every region of the world with low price, high efficiency and fast means. Because of its practicability, high performance and low requirements for computers and communications, the use of email to exchange information has become an important way of communication between people. With the development of computer software and hardware and the improvement of communication service quality, the mail system realizes the transmission of various types of information, such as electronic letter, file digital, image and digital voice. At the same time, users can easily get a lot of free news information, a variety of special email information, to achieve rapid and efficient information retrieval, its extensive use has changed the traditional way of communication. E-mail is a kind of information exchange system between Internet and all other local area network systems. The data sender and receiver are everyone, so it can meet the need of communication between people. This paper mainly introduces the design and implementation of e-mail server. Firstly, it introduces the history of email system and its research status at home and abroad, understands the development level of email technology, and further puts forward the work to be carried out in this paper. The working principle of the mail system, the simple mail transfer protocol and the post office protocol are summarized, and the address format and the mail format of the email are introduced, as well as the user agent, the mail transfer agent, This paper introduces the design and implementation of mail server, systematically analyzes SMTP server and POP3 server, and puts forward a scheme for the overall design of mail server. The implementation of the specific SMTP server and POP3 server, the implementation of the domain name system access function, and the realization of the mail delivery function; Finally, the system is tested and pointed out the shortcomings and improvements of this paper, the mail server technical analysis, security technology analysis, and discusses the development trend of the mail system. E-mail on the internet is transmitted by simple mail transfer protocol, which mainly regulates the process of conversation between sender and receiver. In order to retrieve the mail from the mail server, a post office protocol is used, which provides a set of standard mechanism for obtaining the mail from the mailbox. The mail server designed in this paper supports simple mail transfer protocol and post office protocol.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.098

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 馬金虎;C#網(wǎng)絡(luò)編程之八——編寫基于SMTP網(wǎng)絡(luò)應(yīng)用程序[J];電腦愛好者;2003年05期

2 黃俊;殷衛(wèi)紅;;基于Postfix電子郵件系統(tǒng)的設(shè)計與實現(xiàn)[J];上海電力學(xué)院學(xué)報;2006年02期

3 馬金虎;C#網(wǎng)絡(luò)編程之九——編寫基于POP3網(wǎng)絡(luò)應(yīng)用程序[J];電腦愛好者;2003年06期

4 陳訓(xùn)遜,方濱興,李蕾;MIME解碼算法優(yōu)化問題研究[J];計算機應(yīng)用;2003年S2期

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