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1、郑州大学毕业设计（文献翻译）题目：简单邮件传输协议服务扩展的认证机制指导教师：宋伟职称：副教授学生姓名：×××学号：专业：计算机科学与技术院（系）：信息工程学院完成时间：2012年5月15日2012年5月15日外文文献资料SMTPServiceExtensionforAuthenticationThisdocumentspecifiesanInternetstandardstrackprotocolfortheInternetcommunity,andrequestsdiscussionandsuggestionsforimprovements.Ple
2、aserefertothecurrenteditionofthe"InternetOfficialProtocolStandards"(STD1)forthestandardizationstateandstatusofthisprotocol.Distributionofthismemoisunlimited.Thereareusuallytwooperatingmodes:SMTPtosendandreceiveSMTP.Specificway:tosendSMTPmailinthereceiveduserrequesttodeterminewhe
3、therthise-maillocalmail,ifsenttotheuser'smailboxdirectinvestment,ortochecktheremotemailserverdnsMXrecord,andtheestablishmentoftheremotereceivedatwo-waybetweentheSMTPtransmissionchannel,thenbythesendingSMTPcommandissuedbythereceivingSMTPtoreceive,andanswerthecounter-sidedelivery.
4、Oncethetransmissionchannelisestablished,SMTPMAILcommandspecifyingthesendersendsthemessagesender.IftherecipientcanreceivemailSMTPOKresponseisreturned.SMTPRCPTcommandissuedforthesendertoconfirmwhetherthemessageisreceived.IftheSMTPrecipientreceives,itreturnsOKresponse;ifyoucannotre
5、ceive,thenrefusedtoacceptresponsetoissue(butdoesnotsuspendoperationoftheentiremessage),thetwosideswillrepeatsomanytimes.Whentherecipientsreceiveallmessageswillreceiveaspecialsequence,iftherecipientofthemessagesuccessfullyprocessed,itreturnsOKresponse.SMTPcommandsdefinethemailtra
6、nsferorbyuser-definedsystemfunctions.ItscommandisEndofthestring.Inthecasewithparameters,thecommanditselfisandtheparametersseparately,ifnotdirectly,andwithparametersConnection.Mailboxsyntaxandreceivingsitesmustbeconsistentwiththeform.SMTPcommandsandresponsesaredis
7、cussedbelow.Sende-mailoperationsinvolvingdifferentdataobjects,theirmutualconnectionbydifferentparameters.ReplyPathparameteristheMAILcommand,theforwardpathistheRCPTcommandparameter,themessagedateistheDATAcommand.Theseargumentsordataobjectsmustfollowthecommand.Thismodelalsorequire
8、sadifferentbuffertostoretheobjects,thatis,there
