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1、單擊此處編輯主標(biāo)題單擊此處編輯副標(biāo)題單擊此處編輯標(biāo)題正文部分樣例A正文部分樣例B正文部分樣例C正文部分樣例D正文部分樣例I正文部分樣例II正文部分樣例III單擊此處編輯標(biāo)題正文部分樣例A正文部分樣例B正文部分樣例C正文部分樣例D正文部分樣例I正文部分樣例II正文部分樣例III正文標(biāo)題第一級第二級第三級第四級第五級正文標(biāo)題第一級第二級第三級第四級第五級樣例文本AGemmiCong精美PPT模板盡在如下豆單http://www.docin.com/d-326.html&forward=2歡迎大家欣賞和下載樣例文本AGemmiCong精美P

2、PT模板盡在如下豆單http://www.docin.com/d-326.html&forward=2歡迎大家欣賞和下載樣例文本BThearticleaboutsenderrewritingcontainstechnicalbackgroundinfoabouttheearlySMTPhistoryandsourceroutingbeforeRFC1123.Sendmailwasoneofthefirst(ifnotthefirst)mailtransferagentstoimplementSMTP.[citationneeded]S

3、omeotherpopularSMTPserverprogramsincludePostfix,qmail,NovellGroupWise,Exim,NovellNetMail,MicrosoftExchangeServer,SunJavaSystemMessagingServer.Messagesubmission(RFC2476)andSMTP-AUTH(RFC2554)wereintroducedin1998and1999,bothdescribingnewtrendsine-maildelivery.Originally,SM

4、TPserversweretypicallyinternaltoanorganization,receivingmailfortheorganizationfromtheoutside,andrelayingmessagesfromtheorganizationtotheoutside.Butastimewenton,SMTPservers(Mailtransferagents),inpractice,wereexpandingtheirrolestobecomemessagesubmissionagentsforMailuserag

5、ents,someofwhichwerenowrelayingmailfromtheoutsideofanorganization.(e.g.acompanyexecutivewishestosende-mailwhileonatripusingthecorporateSMTPserver.)Thisissue,aconsequenceoftherapidexpansionandpopularityoftheWorldWideWeb,meantthatSMTPhadtoincludespecificrulesandmethodsfor

6、relayingmailandauthenticatinguserstopreventabusessuchasrelayingofunsolicitede-mail(spam).樣例文本BThearticleaboutsenderrewritingcontainstechnicalbackgroundinfoabouttheearlySMTPhistoryandsourceroutingbeforeRFC1123.Sendmailwasoneofthefirst(ifnotthefirst)mailtransferagentstoim

7、plementSMTP.[citationneeded]SomeotherpopularSMTPserverprogramsincludePostfix,qmail,NovellGroupWise,Exim,NovellNetMail,MicrosoftExchangeServer,SunJavaSystemMessagingServer.Messagesubmission(RFC2476)andSMTP-AUTH(RFC2554)wereintroducedin1998and1999,bothdescribingnewtrendsi

8、ne-maildelivery.Originally,SMTPserversweretypicallyinternaltoanorganization,receivingmailfortheorganizationfro