Mail SMTP-madoko ndi kufunika

Today tikambirana chiyani ntchito SMTP-madoko. Ndichidziwitso chimagwiritsidwa ntchito zopezera protocol, anaikira imelo kufala kudzera TCP Intaneti / IP.

mtengo

doko Mail-SMTP anafotokozedwa koyamba mu 1982. Nthawi zambiri, pamene sakutchula dzina la protocol wa ankatanthauza kukula. njira lakonzedwa kutumiza makalata otuluka ntchito doko la TCP 25. Kugwira ntchito pa mlingo wa ntchito wosuta makalata kawirikawiri ntchito SMTP kutumiza mauthenga pa makina kwa relaying zina.

nkhani

SMTP-madoko kutenga chiyambi chawo ku kuzindikira awiri - SNDMSG ndi Mail Bokosi Protocol. njira kupangidwa ndi Ray Tomlinson. luso chitukuko wapitiriza pa 1970, pamene mu 1980 panalibe intaneti mu maonekedwe ake masiku ano. Izo zatsimikiziridwa kuti SMTP-madoko ntchito bwino ngati kutumiza ndi kulandira zipangizo pa maukonde mowirikiza chikugwirizana. Chapadera Sendmail chisankho. Ichi ndi chimodzi mwa uthenga woyamba anatumiza nthumwi amene ntchito luso SMTP.

makalata processing

SMTP doko amagwiritsa mayina ankalamulira kupeza mbiri wolandira ankalamulira makalata exchanger. Tikuyankhula zokhudza mbali ya adiresi ili kumanja kwa chizindikiro @. Onani kuti doko SSL SMTP mmagawo imelo ntchito protocol koyenera ndi kugwirizana encrypted. Pambuyo uthenga kwa m'dera seva uthenga yotsatira ndi ntchito kasitomala ntchito protocol IMAP. Limadzitsegula wodziwa zambiri ndi kusamalira imelo. Komanso mokhudzana anafotokoza Pop protocol angagwiritsidwe ntchito, kapena machitidwe kampani monga Microsoft Outlook kapena zamaluwa Ndemanga. Onani kuti SMTP mwachindunji ndiyo kutenga mauthenga, koma zili. Choncho anapatsidwa envelopu uthenga, komanso magawo ake. Komabe, mutu ndi thupi la uthenga kwa ndondomeko alibe ntchito.

Protocol mwachidule

Kudzera doko SMTP ndi sender ndi wolandira wa uthenga umanena ndi mzake. Deta zofunika Choncho analandira kudzera njira yodalirika. Iwo amakonda kukhala TCP-kugwirizana. SMTP-gawo lili malamulo anatumidwa ndi kasitomala, komanso mayankho lolingana Seva. Chifukwa ndi nzeru magawo. SMTP-ntchito ndondomeko limapangidwa atatu lamulo / ayankhe. Makalata amasonyeza adiresi kubwerera zofunika mauthenga anabwerera. RCPT KUTI wolandira maina. Lamulo limeneli angagwiritsidwe ntchito maulendo angapo. Kamodzi aliyense wolandira.

DETA lamulo ntchito mwachindunji kwa kufala kwa mauthenga. Pankhaniyi tikulankhula zili uthenga, osati mbali ya chigoba chake. mchitidwe tichipeza thupi ndi uthenga chamutu, omwe analekana ndi mzere kanthu. DETA - kwenikweni ndi gulu la malamulo. Komabe, makina kuyankha kawiri. Choyamba, mwachindunji lamulo DETA, potero kudziwitsa dongosolo la ofunitsitsa kulandira uthengawo. Komanso, yankho amapita ku mapeto a akuyambira deta. M'pofunika kutenga kapena kukana kalata lonse. Aliyense wa mayankho ambiri Server zabwino kapena zoipa, umboni ndi malamulo ake. Yotsirizira akhoza yochepa kapena okhazikika. Kudzera m'ndondomekozi wapadera makina inanena kuti pali akuyembekezera deta zina kwa kasitomala. maseva bwinobwino kuthandiza makalata onse resubmitted mu chochitika kulakwa.

SMTP - protocol izi yobereka. ganizo limeneli akhoza kumwedwa pa mauthenga pempho kwa wina Seva akumidzi. Kupeza e-mail, ndi kusamalira makalata bokosi analengedwa ndi ndondomeko zina, monga Pop, ndi IMAP. Kwa luso lamakono ayenera kukopedwa, ngati kompyuta si nthawi zonse anatembenukira kapena angapeze yochepa Intaneti.

Tsopano kuti kumidzi makalata ima pamzere wayamba. Tikuyankhula zokhudza maonekedwe a SMTP. Timatha khamu kutali kuyamba processing pamzera uthenga ntchito makina. Choncho, otsiriza akhoza kulandira makalata zofunika pogwiritsa ntchito kutembenukira lamulo. Special ODMR umisiri ndi kupereka uthenga kwa wosuta wotsimikiziridwa. E-mail chofunika pamene nkhani analenga pogwiritsa ntchito zilembo Latin. Kwa anthu amene alibe mwayi kwa English kiyibodi, muyezo RFC 6531. Chifukwa cha iye anayamba makalata waphunzira kuzindikira "owonjezera" otchulidwa. Kotero ife mwachidule za zimene SMTP-madoko ndi zimene ntchito.