Mail SMTP-kumazibuko kunye nokubaluleka kwazo

Namhlanje siza kuthetha oko SMTP-namachweba. Ibe malunga isetyenziswa ngokubanzi Iprotocolo yomsebenzi womnatha, yenzelwe transmission i-imeyile nge TCP networks / IP.

inani

Mail-SMTP port wachazwa kuqala ngo-1982. Ngokufuthi, kokuchaza igama protocol, kwakuthetha ukwanda yayo. Esi sisombululo yenzelwe ukuthumela imeyile aphumayo usebenzisa kwizibuko TCP 25. Ukusebenza kwinqanaba kwezicelo mail yomsebenzisi ovame SMTP ukuthumela imiyalezo kumncedisi ukuze kudluliswa ngakumbi.

indaba

SMTP-amazibuko athathe imvelaphi yabo siyiqaphele amabini - SNDMSG and Mail Box Protocol. Le isisombululo yaqanjwa Ray Tomlinson. kwezobuchwepheshe iye yaqhubeka ngexesha 1970, ngoxa ngowe-1980 kwakukho akukho internet ngohlobo lwalo. Kuye singqiniwe ukuba SMTP-amazibuko isebenze kakuhle xa IR yokuthumela nokufumana izixhobo kumsebenzi womnatha zisoloko uxhulumanisa. Isigqibo Sendmail wabalasela. Le yenye imiyalezo yokuqala eyayithunyelwe arhente abo basebenzisa ubuchwepheshe SMTP.

processing mail

SMTP port isebenzisa amagama domain ukuze ufumane iirekhodi miso imeyile domain kumamkeli. Sithetha inxalenye idilesi indawo kwicala lasekunene isimboli @. Qaphela ukuba i SSL SMTP ezibuko kwiiseshoni i-imeyile usebenzisa lo protocol olufanelekileyo lwe khowudi. Emva kunokuthumela umyalezo yendawo umncedisi umyalezo kwakhona yi izicelo zomxhasi usebenzisa IMAP protocol. Kuvula ukufikelela kulwazi nokulawula email. Kwakhona, ngokuba kuchaziwe protocol POP ingasetyenziswa, okanye iinkqubo ezizizo ezifana Microsoft Outlook okanye Lotus Notes. Qaphela ukuba SMTP umisela ngqo ekudluliseni imiyalezo, kodwa hayi umxholo. Ngoko ke, enikwe nemvulophu umyalezo, kwakunye parameters zayo. Noko ke, isihloko kunye nomzimba womyalezo kwinkqubo azisebenzi.

protocol Overview

Ngokusebenzisa nezibuko SMTP umthumeli umamkeli womyalezo anxulunyaniswa omnye komnye. Ngaloo ndlela data eziyimfuneko efunyenwe nge ijelo ethembekileyo. Ajongeka TCP-intanethi. yeseshini-SMTP iqulethe imiyalelo ethunyelwe ngumxhasi, kwakunye neempendulo server ahambelanayo. Isiphumo utshintshiselwano parameters. ulandelelwano SMTP-operation iquka umyalelo ezintathu / impendulo. IMEYILI FROM ibonisa idilesi ezifunekayo imiyalezo babuya. RCPT TO amagama umamkeli. Lo myalelo ingasetyenziswa izihlandlo ezininzi. Kanye ngenxa yento nganye.

umyalelo EDATHA isetyenziswa ngqo ukuba ukudluliselwa imiyalezo. Kule meko sithetha ngayo umxholo womyalezo, kunokuba yinxalenye iqokobhe layo. Le nto iquka omzimba kunye header yomyalezo, ezo ezahlulwe a migca. ULWAZI - kuba eneneni kukho iqela imiyalelo. Nangona kunjalo, iseva aphendule kubo kabini. Okokuqala, ngqo ukuya KWEDATHA umyalelo, ngaloo ndlela lusazisa inkqubo sokuzimisela zabo ukuze bamkele isigidimi. Ukongeza, impendulo iya ekupheleni ukulandelelana data. Kuyimfuneko ukuba okanye ukwala yonke ileta. Ngalinye iimpendulo ezininzi Umncedisi entle okanye embi, njengoko oko kungqinwa ikhowudi yayo. Le yokugqibela kunokuba yinto nje yokwexeshana okanye ngokusisigxina. Ngokusebenzisa ikhowudi ekhethekileyo iseva iingxelo lokuba elinde iinkcukacha ezongezelelweyo evela client. iiseva esebenza ngokupheleleyo inkxaso zonke iileta lufakwe xa kuthe yemposiso.

SMTP - lo protocol delivery. Esi sigqibo ingenakuthatyathwa kwi imiyalezo isicelo evela kwiseva ethile ekude. Ukufumana i-imeyile, kunye nokulawula ibhokisi mail yenziwe yi ezinye iprotocol, ezifana POP, kunye ne IMAP. Kubuchwepheshe yamvanje kufuneka sibhalwe, ukuba ikhomputha akusoloko ivuliwe okanye ukufikelela yethutyana kwi-Internet.

Ngoku kwi posi umgca ekude iqala. Sithetha iimpawu SMTP. Ivumela nginginya yobekelo kude ukuqalisa kulungiswa kumgcelele lomyalezo ngokusebenzisa i umncedisi. Ngenxa yoko, akwazi ukufumana iincwadi eziyimfuneko kuye usebenzisa umyalelo kuthi. ODMR technology Special ivumela ukuthumela umyalezo umsebenzisi ingangqinisiswa njengenyanisekileyo. E-mail iyafuneka xa i-akhawunti idaliwe usebenzisa abalinganiswa kuphela Latin. imeyile abasebenzisi abangakwaziyo ukufikelela kwi-keyboard IsiNgesi, i RFC standard 6531. Ngenxa kuye waphuhliswa sele efundile ukuqaphela amagama 'extra ". Ngoko wathetha ngokufutshane malunga noko SMTP-kumazibuko noko zisetyenziswa.