Simple Mail Transfer Protocol (SMTP) se pou\u017e\u00edv\u00e1 k odes\u00edl\u00e1n\u00ed a p\u0159ij\u00edm\u00e1n\u00ed e-mail\u016f mezi e-mailov\u00fdmi klienty a servery. Kdy\u017e SMTP server<\/b> p\u0159ij\u00edm\u00e1 e-maily od po\u0161tovn\u00edho klienta, SMTP server<\/b> pot\u00e9 zkontroluje z\u00e1znamy MX pro dom\u00e9nu v e-mailov\u00e9 adrese, aby si vym\u011bnil e-mail se vzd\u00e1len\u00fdm serverem SMTP. SMTP nebo Simple Mail Transfer Protocol je aplikace pou\u017e\u00edvan\u00e1 k odes\u00edl\u00e1n\u00ed, p\u0159ij\u00edm\u00e1n\u00ed a p\u0159ed\u00e1v\u00e1n\u00ed odchoz\u00edch e-mail\u016f mezi odes\u00edlateli a p\u0159\u00edjemci. Kdy\u017e je e-mail odesl\u00e1n, je p\u0159en\u00e1\u0161en z jednoho serveru na druh\u00fd p\u0159es internet pomoc\u00ed SMTP.<\/p>\n
<\/p>\n
Jednodu\u0161e \u0159e\u010deno, an SMTP email<\/b> je pouze e-mail odeslan\u00fd prost\u0159ednictv\u00edm serveru SMTP. SMTP je zkratka pro \u201eSimple Message Transfer Protocol\u201c. Toto je protokol, kter\u00fd v\u00e1\u0161 e-mailov\u00fd klient pou\u017e\u00edv\u00e1, kdy\u017e m\u00e1te odchoz\u00ed zpr\u00e1vy. Pokud jde o fyzick\u00fd po\u0161tovn\u00ed syst\u00e9m, SMTP jako slu\u017eba by byl po\u0161tovn\u00ed v\u016fz, proto\u017ee p\u0159epravuje e-maily z va\u0161\u00ed doru\u010den\u00e9 po\u0161ty do doru\u010den\u00e9 po\u0161ty p\u0159\u00edjemce.<\/p>\n
Abychom pochopili rozd\u00edl, poj\u010fme zjistit, jak vlastn\u011b SMTP funguje a co se d\u011bje pod poklic\u00ed odes\u00edl\u00e1n\u00ed e-mail\u016f. E-maily jsou odes\u00edl\u00e1ny z klienta po\u0161tovn\u00edho u\u017eivatelsk\u00e9ho agenta (MUA) p\u0159es SMTP na TCP portu 587 na po\u0161tovn\u00ed server (Mail Submission Agent, MSA). SMTP nebo Simple Mail Transfer Protocol je sada komunika\u010dn\u00edch z\u00e1sad, kter\u00e9 pou\u017e\u00edvaj\u00ed e-mailov\u00e9 servery k odes\u00edl\u00e1n\u00ed e-mail\u016f sv\u00fdm z\u00e1kazn\u00edk\u016fm. Stru\u010dn\u011b \u0159e\u010deno, role e-mailu a SMTP servery<\/b> v ka\u017ed\u00e9 organizaci je rozhoduj\u00edc\u00ed pro jejich hladk\u00e9 fungov\u00e1n\u00ed. Obecn\u011b m\u016f\u017eete naj\u00edt sv\u016fj Adresa e-mailov\u00e9ho serveru SMTP<\/b> v \u010d\u00e1sti \u00da\u010det nebo Nastaven\u00ed va\u0161eho po\u0161tovn\u00edho klienta.<\/p>\n
On-Demand Mail Relay (ODMR) je roz\u0161\u00ed\u0159en\u00ed SMTP, kter\u00e9 je standardizov\u00e1no v RFC 2645 a umo\u017e\u0148uje p\u0159eru\u0161ovan\u011b p\u0159ipojen\u00e9mu serveru SMTP p\u0159ij\u00edmat e-maily, kter\u00e9 jsou pro n\u011bj za\u0159azeny ve front\u011b, kdy\u017e je p\u0159ipojen. Jak ji\u017e bylo zm\u00edn\u011bno, server SMTP se pou\u017e\u00edv\u00e1 ke spolehliv\u00e9mu a bezpe\u010dn\u00e9mu doru\u010dov\u00e1n\u00ed transak\u010dn\u00edch i hromadn\u00fdch e-mail\u016f. P\u016fvodn\u00ed n\u00e1vrh SMTP nem\u011bl \u017e\u00e1dn\u00fd zp\u016fsob, jak ov\u011b\u0159it odes\u00edlatele nebo ov\u011b\u0159it, \u017ee servery byly opr\u00e1vn\u011bny odes\u00edlat jejich jm\u00e9nem, co\u017e umo\u017e\u0148ovalo e-mailov\u00e9 spoofing a \u010dasto se pou\u017e\u00edv\u00e1 v e-mailov\u00e9m spamu a phishingu. Kdy\u017e u\u017eivatel klepne na Odeslat v e-mailov\u00e9 zpr\u00e1v\u011b, e-mailov\u00fd klient otev\u0159e p\u0159ipojen\u00ed SMTP k serveru, aby mohl odes\u00edlat.<\/p>\n
SMTP, co\u017e je zkratka pro Simple Mail Transfer Protocol, je e-mailov\u00fd protokol, kter\u00fd odes\u00edl\u00e1 e-mailov\u00e9 zpr\u00e1vy z jednoho e-mailov\u00e9ho \u00fa\u010dtu na druh\u00fd p\u0159es internet. Tak\u017ee pokud hled\u00e1te slu\u017eba SMTP<\/b> pro velkou spole\u010dnost, kter\u00e1 dok\u00e1\u017ee hromadn\u011b pos\u00edlat stovky a tis\u00edce e-mail\u016f, byste m\u011bli zvolit placenou slu\u017ebu SMTP. Chcete-li odes\u00edlat e-maily, mus\u00edte p\u0159i nastavov\u00e1n\u00ed e-mailov\u00e9ho klienta zadat spr\u00e1vn\u00fd server SMTP. E-mailov\u00fd klient pot\u0159ebuje zn\u00e1t IP adresu sv\u00e9ho p\u016fvodn\u00edho SMTP serveru a mus\u00ed b\u00fdt zad\u00e1na v r\u00e1mci sv\u00e9 konfigurace (obvykle zad\u00e1v\u00e1no jako DNS jm\u00e9no).<\/p>","protected":false},"excerpt":{"rendered":"
Simple Mail Transfer Protocol (SMTP) se pou\u017e\u00edv\u00e1 k odes\u00edl\u00e1n\u00ed a p\u0159ij\u00edm\u00e1n\u00ed e-mail\u016f mezi e-mailov\u00fdmi klienty a servery. Kdy\u017e server SMTP p\u0159ijme e-mail od po\u0161tovn\u00edho klienta, server SMTP pot\u00e9 zkontroluje z\u00e1znamy MX pro dom\u00e9nu v e-mailov\u00e9 adrese, aby si vym\u011bnil e-mail se vzd\u00e1len\u00fdm serverem SMTP. SMTP nebo jednoduch\u00fd [\u2026]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[15],"tags":[],"class_list":["post-216","post","type-post","status-publish","format-standard","hentry","category-smtp-simple-mail-transfer-protocol-faq"],"_links":{"self":[{"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/posts\/216","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/comments?post=216"}],"version-history":[{"count":0,"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/posts\/216\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/media?parent=216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/categories?post=216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.freesmtpserver.net\/cs\/wp-json\/wp\/v2\/tags?post=216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}