【正文】 長沙航空職業(yè)技術學院畢業(yè)設計目　錄1 緒論 ..........................................................................................................................................................3 電子郵件介紹 ..............................................................................................................................................3 介紹 ......................................................................................................................................................3 開發(fā)背景 ......................................................................................................................................................4 課題研究方法 ..............................................................................................................................................4 開發(fā)環(huán)境及運行環(huán)境 ..................................................................................................................................4 開發(fā)環(huán)境 ...........................................................................................................................................4 運行環(huán)境 ...........................................................................................................................................42 郵件收發(fā)系統(tǒng)設計 ....................................................................................................................................5 軟件架構及系統(tǒng)用例圖 ..............................................................................................................................5 系統(tǒng)架構 ...........................................................................................................................................5 系統(tǒng)總體用例 ...................................................................................................................................6 程序功能框圖 ...................................................................................................................................63　 電子郵件的標準格式 (RFC 822) .............................................................................................................7 RFC 822 簡介 .............................................................................................................................................7 信件的頭部 ..................................................................................................................................................7 信頭的一般格式 ...............................................................................................................................7 結構化字段和非結構化字段 ...........................................................................................................8 信頭字段的元素 ...............................................................................................................................8 標準的信頭字段 ..................................................................................................................................9 SMTP 協(xié)議簡介及工作原理 .......................................................................................................................12 介紹 ...................................................................................................................................................12 SMTP 模型 ..........................................................................................................................................12 SMTP 協(xié)議的命令和應答 .........................................................................................................................13 SMTP 協(xié)議的命令 ..........................................................................................................................13 SMTP 的應答碼 ................................................................................................................................144　 重要模塊設計 .........................................................................................................................................16 用戶登錄模塊 ............................................................................................................................................16 用戶郵箱主頁 ............................................................................................................................................16 收件箱 ........................................................................................................................................................16 發(fā)件箱 ........................................................................................................................................................17 刪除郵件 ....................................................................................................................................................17 通訊錄 ........................................................................................................................................................17 草稿箱 ........................................................................................................................................................17 新建聯(lián)系人 ................................................................................................................................................18 寫信 ............................................................................................................................................................18 郵 件 收 發(fā) 系 統(tǒng) 郵件轉發(fā) ..................................................................................................................................................185 主要功能介紹 ...........................................................................................................................................19 用戶登錄模塊 ............................................................................................................................................19 框架的搭建 ......................................................................................