{"id":12,"date":"2015-03-24T20:17:32","date_gmt":"2015-03-24T20:17:32","guid":{"rendered":"http:\/\/www.smtp-server.net\/?page_id=12"},"modified":"2015-03-24T21:05:13","modified_gmt":"2015-03-24T21:05:13","slug":"vysvetleni-sluzby-smtp","status":"publish","type":"page","link":"https:\/\/www.smtp-server.net\/cs\/vysvetleni-sluzby-smtp\/","title":{"rendered":"Vysv\u011btlen\u00ed protokolu SMTP"},"content":{"rendered":"<p><strong>SMTP - Jednoduch\u00fd protokol pro p\u0159enos po\u0161ty<\/strong><\/p>\n<p>Ze v\u0161ech webov\u00fdch technologi\u00ed se SMTP pravd\u011bpodobn\u011b zm\u011bnil nejm\u00e9n\u011b, st\u00e1le je v podstat\u011b stejn\u00fd, jako byl p\u016fvodn\u011b navr\u017een.  Jist\u011b, ov\u011b\u0159ov\u00e1n\u00ed se \u010das od \u010dasu m\u011bn\u00ed, ale j\u00e1dro protokolu SMTP z\u016fstalo nem\u011bnn\u00e9.  Muselo se v\u0161ak p\u0159izp\u016fsobit, bylo t\u0159eba se vypo\u0159\u00e1dat se spamem, \u010dern\u00fdmi listinami a otev\u0159en\u00fdmi relay a pr\u00e1v\u011b tento \"\u0161roubovan\u00fd\" p\u0159\u00edstup zp\u016fsobil, \u017ee se do n\u011bj vloudila ur\u010dit\u00e1 nespolehlivost. <\/p>\n<p><strong>Co d\u011bl\u00e1 protokol SMTP?<\/strong><\/p>\n<p>SMTP je proces, kter\u00fdm se p\u0159ed\u00e1v\u00e1 po\u0161ta mezi servery.Pokud jste n\u011bkdy pos\u00edlali e-mail mimo sv\u00e9 uzav\u0159en\u00e9 pracovn\u00ed prost\u0159ed\u00ed, pak jste SMTP pou\u017eili.  P\u0159i konfiguraci e-mailov\u00e9ho klienta, jako je Outlook nebo Thunderbird, je nutn\u00e9 p\u0159idat p\u0159\u00edchoz\u00ed server (obvykle se jedn\u00e1 o POP3 nebo IMAP) a odchoz\u00ed server, co\u017e je SMTP.  Kdy\u017e pak ode\u0161lete e-mail, je doru\u010den p\u0159es tento server SMTP bu\u010f p\u0159\u00edmo na server p\u0159\u00edjemce, nebo p\u0159es n\u011bkolik mezilehl\u00fdch server\u016f.  Obecn\u011b plat\u00ed, \u017ee protokol SMTP nen\u00ed bezpe\u010dn\u00fd.<\/p>\n<p>Existuje n\u011bkolik standardn\u00edch port\u016f, na kter\u00fdch server SMTP naslouch\u00e1, v\u011bt\u0161inou se pou\u017e\u00edv\u00e1 port 25, ale b\u011b\u017en\u00e9 jsou tak\u00e9 porty 587, 465 a 2525.  Probl\u00e9my mohou nastat, pokud poskytovatel internetov\u00e9ho p\u0159ipojen\u00ed zablokuje port 25 a omez\u00ed u\u017eivatele na pou\u017e\u00edv\u00e1n\u00ed pouze sv\u00e9ho serveru SMTP.  D\u011blaj\u00ed to proto, aby zabr\u00e1nili \u0161\u00ed\u0159en\u00ed SPAMu z jejich s\u00edt\u011b, ale tento p\u0159\u00edstup m\u016f\u017ee zp\u016fsobit probl\u00e9my firemn\u00edm u\u017eivatel\u016fm.  Nejhor\u0161\u00ed kombinac\u00ed je poskytovatel internetov\u00e9ho p\u0159ipojen\u00ed, kter\u00fd zablokuje port 25 a pak povol\u00ed p\u0159\u00edstup ke sv\u00e9mu serveru SMTP pouze z ur\u010dit\u00e9ho rozsahu IP adres.  V\u00fdsledkem je u\u017eivatel, kter\u00fd bu\u010f mus\u00ed pou\u017e\u00edvat jinou sadu nastaven\u00ed, kdy\u017e se nep\u0159ipojuje p\u0159es sv\u00e9ho poskytovatele, nebo nem\u016f\u017ee odes\u00edlat e-maily v\u016fbec!  Z tohoto d\u016fvodu bylo n\u011bkolik slu\u017eeb nastaveno s jedin\u00fdm z\u00e1m\u011brem, aby bylo mo\u017en\u00e9 za v\u0161ech okolnost\u00ed pou\u017e\u00edvat jedin\u00fd server SMTP, a to obvykle naslouch\u00e1n\u00edm na jin\u00fdch portech, ne\u017e jsou standardn\u00ed porty SMTP.  Jedn\u00edm z takov\u00fdch p\u0159\u00edklad\u016f je nap\u0159. <a href=\"http:\/\/www.smtp-server.net\/cs\/SMTPServer.php\/\" target=\"_blank\" rel=\"nofollow\">SMTP2Go<\/a>.  <\/p>","protected":false},"excerpt":{"rendered":"<p>SMTP &#8211; Simple Mail Transfer Protocol Of all the web technologies out there SMTP is probably the one that has had the least changes, it is still pretty much as it was originally drafted. Sure the authentication changes from time to time but the core of SMTP has remained constant. It has had to adapt <a href=\"https:\/\/www.smtp-server.net\/cs\/vysvetleni-sluzby-smtp\/\" rel=\"nofollow\"><span class=\"sr-only\">Read more about SMTP Explained<\/span>[&hellip;]<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"open","template":"","meta":{"footnotes":""},"class_list":["post-12","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/pages\/12","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/comments?post=12"}],"version-history":[{"count":2,"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/pages\/12\/revisions"}],"predecessor-version":[{"id":19,"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/pages\/12\/revisions\/19"}],"wp:attachment":[{"href":"https:\/\/www.smtp-server.net\/cs\/wp-json\/wp\/v2\/media?parent=12"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}