【正文】 ...................................................................................................... 4 . 項(xiàng)目背景 .................................................................................................... 4 . 建設(shè)目標(biāo) .................................................................................................... 4 . 設(shè)計(jì)方法論 ................................................................................................ 4 . 面對(duì)的挑戰(zhàn) ................................................................................................ 4 . 參考標(biāo)準(zhǔn) .................................................................................................... 7 . 信息安全標(biāo)準(zhǔn) ............................................................................................. 7 . 項(xiàng)目管理標(biāo)準(zhǔn) ............................................................................................. 7 . 郵件標(biāo)準(zhǔn) .................................................................................................... 8 . 名詞解釋 .................................................................................................... 8 2. 需求應(yīng)答 .................................................................................................................. 0 3. 架構(gòu)設(shè)計(jì) .................................................................................................................. 0 . 網(wǎng)絡(luò)架構(gòu)規(guī)劃與設(shè)計(jì) .................................................................................. 0 . 機(jī)房規(guī)劃 .................................................................................................... 1 . 服務(wù)器規(guī)劃與設(shè)計(jì) ..................................................................................... 1 . 存儲(chǔ)系統(tǒng)規(guī)劃與設(shè)計(jì) .................................................................................. 1 . 數(shù)據(jù)庫(kù)規(guī)劃與設(shè)計(jì) ..................................................................................... 1 . 運(yùn)維平臺(tái)規(guī)劃與設(shè)計(jì) .................................................................................. 1 4. 功能需求及解決方案 ............................................................................................... 1 . 郵件應(yīng)用面臨的現(xiàn)實(shí)挑戰(zhàn) .......................................................................... 1 . 兩個(gè)高標(biāo)準(zhǔn)嚴(yán)要求 ..................................................................................... 3 . 反垃圾反病毒安全網(wǎng)關(guān)方案 ....................................................................... 5 . 基本概念 .................................................................................................... 5 . 垃圾郵件發(fā)送手段 ..................................................................................... 5 . 垃圾郵件的特征及反垃圾手段 ................................................................... 6 . 產(chǎn)品特征及技術(shù)標(biāo)準(zhǔn) .................................................................................. 9 . 實(shí)際效果 .................................................................................................. 12 . 系統(tǒng)穩(wěn)定性安全性解決方案 ..................................................................... 12 . 對(duì)網(wǎng)絡(luò)及系統(tǒng)環(huán)境要求的說(shuō)明 ................................................................. 13 . 對(duì)網(wǎng)絡(luò)障礙情況下系統(tǒng)反應(yīng)的說(shuō)明 .......................................................... 13 . 對(duì) DNS 障礙情況下系統(tǒng)反應(yīng)的說(shuō)明 ......................................................... 14 . 對(duì)軟件可能故障系統(tǒng)反應(yīng)的說(shuō)明 ............................................................. 15 . 郵件海外中繼轉(zhuǎn)發(fā)解決方案 ..................................................................... 16 . 海外郵件發(fā)送問(wèn)題原因分析 ..................................................................... 16 . 某軟件 中繼轉(zhuǎn)發(fā)服務(wù)介紹 ........................................................................ 17 . 海外郵件轉(zhuǎn)發(fā)服務(wù)器示意圖 ..................................................................... 17 . 某軟件 的比較優(yōu)勢(shì) ................................................................................... 18 . 國(guó)內(nèi)外收發(fā)互聯(lián)互通解決方案 ................................................................. 18 . 三個(gè)環(huán)節(jié) .................................................................................................. 18 . 四個(gè)層次 .................................................................................................. 19 . 五個(gè)步驟 .................................................................................................. 19 . 郵件審核解決方案 ................................................................................... 20 . 郵件審核概述及必要性分析 ..................................................................... 20 . 某軟件 郵件審核比較優(yōu)勢(shì) ........................................................................ 21 . 郵件備份冗災(zāi)解決方案 ............................................................................ 22 . 數(shù)據(jù)備份的技術(shù)分析 ................................................................................ 22 . 技術(shù)組成 .................................................................................................. 23 . 工程配置 .................................................................................................. 25 . 實(shí)現(xiàn)過(guò)程 .................................................................................................. 25 . 郵件平滑遷移解決方案 ............................................................................ 27 . 工作目標(biāo) .................................................................................................. 27 . 工作順序 .................................................................................................. 27 . 其他說(shuō)明 .................................................................................................. 28 . 郵件全外包服務(wù)解決方案 ........................................................................ 29 . 第一種：租用方式 ............................................................................ 29 . 第二種：自建方式 ............................................................................ 29 . 第三種：系統(tǒng)自建 +服務(wù)全外包方式 ................................................. 30 . 三種方案比較 .................................................................................... 30 . 我方推薦第三種方式的明顯優(yōu)勢(shì) ...................................................... 31 5. 項(xiàng)目實(shí)施方案