【正文】 his 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)境簡介 ............................................................................................................... 3 （一） python 簡介 ........................................................................................................ 3 （二） python 下載安裝 ................................................................................................. 3 （三） pyqt簡介 ............................................................................................................ 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 ..........................................................................................................18 六、系統(tǒng) 總體設(shè)計(jì) ..............................................................................................................19 （一）系統(tǒng)功能規(guī)劃 ....................................................................................................19 （二）系統(tǒng)模塊劃分 ....................................................................................................19 七、系統(tǒng)詳細(xì)設(shè)計(jì) ..............................................................................................................20 （一）功能設(shè)計(jì) ...........................................................................................................20 1. 郵箱認(rèn)證模塊 ...................................................................................................20 2. 郵件發(fā)送模塊 ...................................................................................................20 3. 郵件接收模塊 ...................................................................................................20 4. 黑白名單過濾 ...................................................................................................20 5. 規(guī)則過濾 ..........................................................................................................20 6. 郵件處理 ..........................................................................................................21 （二）系統(tǒng)流程圖 .......................................................................................................22 1. 郵件接收流程圖 ...............................................................................................22 2. 郵件發(fā)送流程圖 .....................................................................................