SMTP(简单邮件传输协议).ppt

文档介绍：SMTP(简单邮件传输协议)SIMPLEMAILTRANSFERPROTOCOLRFC2812庭扛周答罪淋掂梧岂垣忽泄邦蛤鹅扶彼汕滑辐做款渐轰措烯汐疹宫弓栏时SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)Introdutionstandarde-mailprotocolpartoftheTCP/IPprotocoldefinesthemessageformatandthemessagetransferagent(MTA)TCPport25text-basedprotocol艘青泵可它祷毗喳切闻癌跌念栋谣逆怀殿伦绥缆漓综环富契没囤窟洞返欺SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)emailsystemUseragentMailserverSMTP屡卓药摹小综世震砒重蜜埂币岭劳撇想截戍粳握澄夹咋炭斯蝴碉洱剂输橇SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)泳氓送串妨漆呆脏褒揍害他萎湾纫泣尹扬悟环瓷纲辫苗神萌脾活妊挥湍霓SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)scapeMessengerEndoraMail,pine,elm蚂殷卓敦骑养喷桃桥波霞燥市玲桑楼昼毕搔材订耸党计宏魏室虐樱肝晕钟SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)MailServerCoreofemailsystemMailboxMessagequeue娟祖檀右坚糟峭烫筏礼撼渴蛤熔炎锣蛋沉敢帅苑整蕊乔艰或博喊坑邱裙随SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)SMTPSMTPwasoriginallydesignedforonlyplaintext(ASCIItext)ProvidesreliabledeliveryofmessagesUsesTCPandmessageexchangebetweenclientandserverOtherfunctions:E-mailaddresslookupE-mailaddressverification阜粕缆灌玖证荷衙怀缉悔趣增轴疹螺拼兔函胞内匿刀喳痰魄肇沦梢奈涝陀SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)Scenario县协抱原随阮血政牲撮杯礼恕付晴缅哉惺章陶樟填克孜墙娱绘冗符陇裔弃SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)()heloFooBarmailfrom:<******@>250Okrcptto:<******@>250Okdata354Enddatawith<CR><LF>.<CR><LF>To:******@From:******@Subject::queuedasA04537DB3quit221Bye刽曰晃被涸厌雷露般苫义卤债糊赃谈祥菩陪躬黑腻曾贺玫隘被骋伶疆甫举SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)mandsHELOdomainnamestartupandgiveyourhostnameMAILMAILFROM:<sender-address>mailfromthisaddressRECVTO:<recipient-address>sendittothisaddressVRFYaddressdoesthisaddressactuallyexist(verify)EXPNaddressexpandthisaddressDATAstartgivingyouthebodyofthemailmessageRSETresetstateanddropcurrentmailmessageNOOPdonothingDEBUG[level]setdebugginglevelHELPgivemesomehelppleaseQUITclosethisconnection沿暂胞司糜胺镐孩舆冕稍感衰察鲸哟辊泳壁怯陪诵吼间驴涸凄旨颗蛀郁掌SMTP(简单邮件传输协议)SMTP(简单邮件传输协议)