【正文】 本科畢業(yè)論文（設(shè)計(jì)）模板 本科畢業(yè)論文 (設(shè)計(jì) ) 論文題目 ： 互聯(lián)網(wǎng)垃圾郵件防御系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 學(xué)生姓名 ： 薛 樂 學(xué) 號(hào) ： 0905290223 專 業(yè) ： 軟 件 工 程 班 級(jí) ： 0902 指導(dǎo)教師 ： 謝 晶 完成日期 ： 2022 年 5 月 20 日 互聯(lián)網(wǎng)垃圾郵件防御系統(tǒng)的設(shè)計(jì)與實(shí)現(xiàn) 內(nèi)容摘要 近年來，傳統(tǒng)的郵件業(yè)務(wù)相當(dāng)大的被電子郵件所取代，電子郵件成為了人們通信的越來越重要的手段。但是隨著電子郵件本身固有的缺陷，以及軟件易于復(fù)制和傳播的特點(diǎn)，導(dǎo)致了互聯(lián)網(wǎng)上垃圾郵件的泛濫，占用網(wǎng)絡(luò)資源，浪費(fèi)人們的寶貴的時(shí)間，造成了巨大的人力財(cái)力的浪費(fèi)。 本 課題正是在這樣的背景下展開，借此來減少垃圾郵件的傳播，改善網(wǎng)絡(luò)環(huán)境。反垃圾郵件系統(tǒng)通過設(shè)置黑白名單，將白名單用戶的郵件定義為可信任郵件，將黑名單用戶的郵件定義為垃圾郵件；除此之外的用戶則需要對(duì)郵件內(nèi)容進(jìn)行過濾，垃圾郵件的判斷，主要是從敏感關(guān)鍵字來判別 (目前的純客戶端反垃圾郵件多數(shù)基于這一點(diǎn)來做 )。從而減輕了網(wǎng)絡(luò)的負(fù)荷，減少了用戶的負(fù)擔(dān)。 關(guān)鍵詞 :垃圾郵件 反垃圾郵件 黑名單 舉報(bào) 開放轉(zhuǎn)發(fā) AntiSpam system Abstract Recently, the traditional mail service is largely replaced by service which is provided by Inter. Email is being a more and more important means in interactions among people. However, the inherent defect of s that they are easily copied and transmitted leads to the flooding of spam s, which take the precious band width, and waste much of people39。s time, much money and much man power. In this stage, our program is aiming at retrieving a clean work by setting up black or white lists. The determination of spam mainly depends on the counts of reporting times of spam s. Optional rules are judged by sensitive key words (many of current antispam tools are based on this).Finally, Processing Center releases the black list to Inter Service Providers, which filter the s from those addresses in the black lists. Thus, the source of spam s was blocked, so the burden of works was alleviated, help users have a better service experience. Key words: spams antispam black list report openrelay 目 錄 一、緒論 .............................................................................................................................................. 1 （一）課題背景 ........................................................................................................................... 1 （二）國內(nèi)研究狀況分析 ........................................................................................................... 1 二、開發(fā)環(huán)境簡(jiǎn)介 ............................................................................................................................... 3 （一） python 簡(jiǎn)介 ...................................................................................................................... 3 （二） python 下載安裝 .............................................................................................................. 3 （三） pyqt 簡(jiǎn)介 .......................................................................................................................... 4 （四） pyqt 下載安裝 .................................................................................................................. 4 三、垃圾郵件過濾系統(tǒng)相關(guān)理論及技術(shù)分析 ................................................................................... 5 （一）電子郵件 ........................................................................................................................... 5 1. 電子郵件介紹 .................................................................................................................. 5 2. 電子郵件系統(tǒng)的工作原理 .............................................................................................. 5 3. 郵件頭部介紹 .................................................................................................................. 6 （二）垃圾郵件簡(jiǎn)介 ................................................................................................................... 7 1. 垃圾郵件定義 .................................................................................................................. 7 2. 垃圾郵件的危害 .............................................................................................................. 7 3. 垃圾郵件的分類 .............................................................................................................. 8 4. 垃圾郵件采用的技術(shù) ...................................................................................................... 8 （三）反垃圾郵件研究 ............................................................................................................... 9 1. 非技術(shù)手段反垃圾郵件 .................................................................................................. 9 2. 技術(shù)手段反垃圾郵件 .................................................................................................... 10 四、客戶端垃圾郵件過濾技術(shù)研究 ................................................................................................. 13 （一）中文分詞 ......................................................................................................................... 13 1. 中文分詞的常用方法 .................................................................................................... 13 （二）過濾模式 ......................................................................................................................... 14 1. 客戶端過濾模式 ............................................................................................................ 14 2. 多層過濾 ........................................................................................................................ 14 五、系統(tǒng)分析 .................................................................................................................................... 17 （一）可行性分析 ..................................................................................................................... 17 （二） 功能需求分析 ................................................................................................................. 17 1. 基本功能 ........................................................................................................................ 18 2. 核心功能 ...................................................................................................................