【正文】 ................................................................................................6 程序功能框圖 ..........................................................................................................................................6 3 電子郵件的標(biāo)準(zhǔn)格式 (RFC 822) ................................................................................................ 7 RFC 822 簡介 ....................................................................................................................................................7 ..........................................................................................................................................................8 信頭的一般格式 ......................................................................................................................................8 結(jié)構(gòu)化字段和非結(jié)構(gòu)化字段 .................................................................................................................8 信頭字段的元素 ......................................................................................................................................8 .........................................................................................................................................9 SMTP協(xié)議簡介及工作原理 ............................................................................................................................ 13 介紹 .......................................................................................................................................................... 13 SMTP模型 ................................................................................................................................................ 13 SMTP協(xié)議的命令和應(yīng)答 .............................................................................................................................. 14 SMTP協(xié)議的命令 ................................................................................................................................ 14 SMTP的應(yīng)答碼 ...................................................................................................................................... 15 4 重要模塊設(shè)計(jì) ..........................................................................................................................16 .................................................................................................................................................. 16 .................................................................................................................................................. 17 ............................................................................................................................................................... 17 ............................................................................................................................................................... 17 ........................................................................................................................................................... 18 ............................................................................................................................................................... 18 ............................................................................................................................................................... 18 ....................................................................................................................................................... 19 ................................................................................................................................................................... 19 郵件收發(fā)系統(tǒng) ......................................................................................................................................................... 19 5 主要功能介紹 ............................................................................................................................20 .................................................................................................................................................. 20 ....................................................................................................................................................... 21 ： .............................................................................................................................................. 21 Log 及鏈接： ................................................................................................................. 21 ............................................................................................................................................................... 22 ........................................................................................................................................................... 24 ： ......................................................................................................................... 24 : ........................................................................................................................................ 25 ........................................................................................................................................................... 28 ID： ................................................................................................................ 28 ： ......................................................................................................................... 29 ............................................................................................................................................................... 29 綁定通訊錄： ...................................................................................