{"id":7458,"date":"2026-10-12T13:03:56","date_gmt":"2026-10-12T11:03:56","guid":{"rendered":"https:\/\/eu.klytic.com\/ochrana-stavajiciho-e-mailu\/"},"modified":"2026-10-12T16:14:06","modified_gmt":"2026-10-12T14:14:06","slug":"ochrana-stavajiciho-e-mailu","status":"publish","type":"page","link":"https:\/\/eu.klytic.com\/cs\/ochrana-stavajiciho-e-mailu\/","title":{"rendered":"Ochrana e-mailov\u00e9ho syst\u00e9mu, kter\u00fd u\u017e m\u00e1te"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"7458\" class=\"elementor elementor-7458 elementor-6296\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-34263a1 e-con-full kly-g e-flex e-con e-parent\" data-id=\"34263a1\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-add7702 e-con-full kly-g-hero e-flex e-con e-parent\" data-id=\"add7702\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-fb533e2 e-con-full kly-g-hero-in e-flex e-con e-parent\" data-id=\"fb533e2\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b4fe699 elementor-widget elementor-widget-text-editor\" data-id=\"b4fe699\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"kly-g-crumb\"><a href=\"\/\">Dom\u016f<\/a><span>\u203a<\/span>P\u0159\u00edru\u010dky<span>\u203a<\/span>Zabezpe\u010den\u00ed e-mail\u016f<\/p><p class=\"kly-g-pill\" style=\"--pill:#f87171\">Zabezpe\u010den\u00ed e-mail\u016f \u00b7 Pochopit<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9f8a240 elementor-widget elementor-widget-heading\" data-id=\"9f8a240\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Ochrana e-mailov\u00e9ho syst\u00e9mu, kter\u00fd u\u017e m\u00e1te<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76d497a elementor-widget elementor-widget-text-editor\" data-id=\"76d497a\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"kly-g-lead\">Ano, ochranu Microsoft 365, Google Workspace, Exchange nebo jin\u00e9ho serveru lze pos\u00edlit beze zm\u011bny e-mailov\u00e9ho syst\u00e9mu. Z\u00e1znam MX dom\u00e9ny ur\u010d\u00ed br\u00e1nu, kter\u00e1 po\u0161tu analyzuje a pak ji doru\u010d\u00ed na st\u00e1vaj\u00edc\u00ed server. U\u017eivatel\u00e9 si ponechaj\u00ed sv\u00e9 schr\u00e1nky; spr\u00e1vce DNS i administr\u00e1tor e-mailov\u00e9ho syst\u00e9mu maj\u00ed ka\u017ed\u00fd jedno nastaven\u00ed na starosti.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8dca519 elementor-widget elementor-widget-text-editor\" data-id=\"8dca519\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p class=\"kly-g-meta\"><span>Aktualizov\u00e1no: <b>\u0159\u00edjen 2026<\/b><\/span><span><b>7 min<\/b><\/span><span>Citovan\u00e9 ofici\u00e1ln\u00ed zdroje<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a1df9d4 e-con-full kly-g-body e-flex e-con e-parent\" data-id=\"a1df9d4\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-4374ef6 e-con-full kly-g-article e-flex e-con e-parent\" data-id=\"4374ef6\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-59d1a8e elementor-widget elementor-widget-text-editor\" data-id=\"59d1a8e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Rozhodnut\u00ed: ponechat schr\u00e1nku, zm\u011bnit MX<\/h2><p>Zm\u011bna e-mailov\u00e9ho syst\u00e9mu a zm\u011bna ochrany jsou dva r\u016fzn\u00e9 projekty. Prvn\u00ed p\u0159esouv\u00e1 schr\u00e1nky, historii, kalend\u00e1\u0159e a \u00fa\u010dty v telefonech. Druh\u00fd se dot\u00fdk\u00e1 jen cesty p\u0159\u00edchoz\u00ed po\u0161ty.<\/p><p>Tato cesta je d\u00e1na jedn\u00edm z\u00e1znamem DNS: MX, kter\u00fd odes\u00edlaj\u00edc\u00edm server\u016fm \u0159\u00edk\u00e1, kam doru\u010dovat po\u0161tu va\u0161\u00ed dom\u00e9ny. Kdy\u017e ur\u010duje br\u00e1nu, ta zpr\u00e1vu p\u0159ijme, analyzuje a pak ji p\u0159ed\u00e1 serveru se schr\u00e1nkami. To plat\u00ed pro:<\/p><ul><li>Microsoft 365 (Exchange Online);<\/li><li>Google Workspace;<\/li><li>Exchange nainstalovan\u00fd u v\u00e1s nebo hostovan\u00fd;<\/li><li>jak\u00fdkoli jin\u00fd po\u0161tovn\u00ed server, kter\u00fd p\u0159ij\u00edm\u00e1 p\u0159es SMTP;<\/li><li>Klytic Mail, kter\u00fd je jen jedn\u00edm z p\u0159\u00edpad\u016f, ne p\u0159edpokladem.<\/li><\/ul><p>Tento pr\u016fvodce se zab\u00fdv\u00e1 p\u0159\u00edpadem, kdy si schr\u00e1nku ponech\u00e1v\u00e1te. Pokud m\u011bn\u00edte i server, popisuj\u00ed tento projekt pr\u016fvodci <a href='\/cs\/migrace-z-microsoft-365\/'>migrace z Microsoft 365<\/a> a <a href='\/cs\/migrace-z-google-workspace\/'>migrace z Google Workspace<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-af7ff52 elementor-widget elementor-widget-text-editor\" data-id=\"af7ff52\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Kdo co m\u011bn\u00ed<\/h2><div class=\"kly-table\"><table><thead><tr><th>Nastaven\u00ed<\/th><th>Kde<\/th><th>Kdo<\/th><\/tr><\/thead><tbody><tr><td>Z\u00e1znam MX dom\u00e9ny<\/td><td>Z\u00f3na DNS, u registr\u00e1tora nebo poskytovatele DNS<\/td><td>Osoba, kter\u00e1 spravuje DNS, nebo dodavatel, na kter\u00e9ho byla spr\u00e1va delegov\u00e1na<\/td><\/tr><tr><td>Nastaven\u00ed br\u00e1ny v e-mailov\u00e9m syst\u00e9mu<\/td><td>Administra\u010dn\u00ed konzole Microsoft 365, Google Workspace nebo serveru<\/td><td>Administr\u00e1tor e-mailov\u00e9ho syst\u00e9mu<\/td><\/tr><tr><td>SPF, DKIM a DMARC<\/td><td>Z\u00f3na DNS<\/td><td>Spr\u00e1vce DNS, po soupisu server\u016f, kter\u00e9 za dom\u00e9nu odes\u00edlaj\u00ed<\/td><\/tr><tr><td>Dom\u00e9ny a doru\u010dovac\u00ed server<\/td><td>Br\u00e1na<\/td><td>Poskytovatel br\u00e1ny, kter\u00fd p\u0159iprav\u00ed konfiguraci<\/td><\/tr><\/tbody><\/table><\/div><h3>Princip u Microsoft 365<\/h3><p>Dokumentace Microsoftu k filtrov\u00e1n\u00ed slu\u017ebou t\u0159et\u00ed strany je jasn\u00e1: MX dom\u00e9ny mus\u00ed ur\u010dovat tuto slu\u017ebu, kter\u00e1 pak doru\u010duje do Exchange Online. Microsoft doporu\u010duje p\u0159\u00edchoz\u00ed konektor typu \u201epartner\u201c, kter\u00fd m\u016f\u017ee odm\u00edtnout po\u0161tu doru\u010denou mimo tuto slu\u017ebu. Doporu\u010duje tak\u00e9 zapnout roz\u0161\u00ed\u0159en\u00e9 filtrov\u00e1n\u00ed pro konektory, aby jeho vlastn\u00ed anal\u00fdza hodnotila skute\u010dn\u00e9ho odes\u00edlatele, a ne adresu br\u00e1ny. Nedoporu\u010duje jen jednodu\u0161e obej\u00edt sv\u00e9 filtrov\u00e1n\u00ed pro adresy slu\u017eby t\u0159et\u00ed strany.<\/p><h3>Princip u Google Workspace<\/h3><p>Google popisuje \u201ep\u0159\u00edchoz\u00ed po\u0161tovn\u00ed br\u00e1nu\u201c: MX ur\u010duje br\u00e1nu a administr\u00e1tor pak v konzoli zad\u00e1 jej\u00ed IP adresy. Gmail je pou\u017e\u00edv\u00e1 k nalezen\u00ed skute\u010dn\u00e9 adresy odes\u00edlatele v hlavi\u010dk\u00e1ch, na n\u00ed\u017e z\u00e1vis\u00ed SPF a jeho hodnocen\u00ed spamu. Lze tak\u00e9 odm\u00edtat po\u0161tu, kter\u00e1 nep\u0159ich\u00e1z\u00ed z br\u00e1ny. Google up\u0159es\u0148uje, \u017ee na po\u0161tu p\u0159ijatou p\u0159es nastavenou br\u00e1nu neuplat\u0148uje politiku DMARC odes\u00edlatele: tato kontrola pak p\u0159ech\u00e1z\u00ed na br\u00e1nu.<\/p><p>Tento pr\u016fvodce nekop\u00edruje obrazovky t\u011bchto konzol\u00ed, kter\u00e9 se m\u011bn\u00ed. P\u0159i nastavov\u00e1n\u00ed postupujte podle ofici\u00e1ln\u00ed str\u00e1nky uveden\u00e9 v z\u00e1pat\u00ed.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7a04156 elementor-widget elementor-widget-text-editor\" data-id=\"7a04156\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>V\u00edce server\u016f za jednou br\u00e1nou<\/h2><p>\u010cast\u00fd p\u0159\u00edpad ve skupin\u011b: mate\u0159sk\u00e1 spole\u010dnost na Microsoft 365, dce\u0159in\u00e1 spole\u010dnost na Google Workspace, t\u0159et\u00ed na star\u0161\u00edm serveru. P\u0159ed v\u0161emi t\u0159emi m\u016f\u017ee st\u00e1t jedin\u00e1 br\u00e1na.<\/p><p>Principem je sm\u011brov\u00e1n\u00ed podle dom\u00e9ny. MX ka\u017ed\u00e9 dom\u00e9ny ukazuje na br\u00e1nu. Pro ka\u017edou dom\u00e9nu br\u00e1na zn\u00e1 server, kter\u00e9mu m\u00e1 po anal\u00fdze po\u0161tu p\u0159edat. Anal\u00fdza je spole\u010dn\u00e1, c\u00edl se li\u0161\u00ed.<\/p><p>V\u00fdhoda: stejn\u00e1 politika filtrov\u00e1n\u00ed, nebo odli\u0161n\u00e1 nastaven\u00ed podle dom\u00e9ny, a \u010dten\u00ed v\u0161ech rozhodnut\u00ed na jednom m\u00edst\u011b. Co p\u0159ipravit: dom\u00e9na, jej\u00ed\u017e schr\u00e1nky jsou rozd\u011bleny mezi dva servery, vy\u017eaduje v\u011bd\u011bt adresu po adrese, kam doru\u010dovat. Tento p\u0159\u00edpad se posuzuje p\u0159ed p\u0159epnut\u00edm.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-744ae0e elementor-widget elementor-widget-text-editor\" data-id=\"744ae0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Co se m\u011bn\u00ed a co ne<\/h2><p><strong>Nem\u011bn\u00ed se<\/strong>: adresy, schr\u00e1nky, historie, e-mailov\u00fd program, webmail, telefony. Vestav\u011bn\u00fd filtr e-mailov\u00e9ho syst\u00e9mu d\u00e1l funguje. Pr\u00e1va a intern\u00ed sd\u00edlen\u00ed z\u016fst\u00e1vaj\u00ed takov\u00e1, jak\u00e1 jsou na platform\u011b.<\/p><p><strong>M\u011bn\u00ed se<\/strong>:<\/p><ul><li>Prvn\u00ed server, kter\u00fd po\u0161tu p\u0159ij\u00edm\u00e1. Pr\u00e1v\u011b on vid\u00ed p\u016fvodn\u00ed p\u0159ipojen\u00ed a ov\u011b\u0159uje autentizaci odes\u00edlatele.<\/li><li>Server se schr\u00e1nkami u\u017e nevid\u00ed odes\u00edlatele p\u0159\u00edmo, ale br\u00e1nu. Odtud nastaven\u00ed popsan\u00e9 v\u00fd\u0161e.<\/li><li>Zpr\u00e1vy nesou rozhodovac\u00ed hlavi\u010dky br\u00e1ny: administr\u00e1tor si v nich m\u016f\u017ee p\u0159e\u010d\u00edst, pro\u010d byla zpr\u00e1va doru\u010dena nebo odlo\u017eena stranou.<\/li><li>Pokud br\u00e1na p\u0159ed\u00e1v\u00e1 i odch\u00e1zej\u00edc\u00ed po\u0161tu, mus\u00ed ji z\u00e1znam SPF dom\u00e9ny povolovat a mus\u00ed pro ni b\u00fdt zve\u0159ejn\u011bn podpis DKIM. Smysl t\u011bchto mechanism\u016f vysv\u011btluje pr\u016fvodce <a href='\/cs\/spf-dkim-dmarc-ochrana-domeny\/'>SPF, DKIM a DMARC<\/a>.<\/li><\/ul><p>A\u017e jednou zm\u011bn\u00edte i server se schr\u00e1nkami, br\u00e1na m\u016f\u017ee z\u016fstat na m\u00edst\u011b: zm\u011bn\u00ed se jen jej\u00ed doru\u010dovac\u00ed server. Pro tento den z\u016fst\u00e1v\u00e1 referenc\u00ed pr\u016fvodce <a href='\/cs\/migrace-e-mailu-bez-preruseni\/'>migrace e-mailu bez p\u0159eru\u0161en\u00ed provozu<\/a>, v\u010detn\u011b SPF, DKIM a DMARC.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0262e1f elementor-widget elementor-widget-text-editor\" data-id=\"0262e1f\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Zaveden\u00ed krok za krokem<\/h2><ol><li>Soupis: dom\u00e9ny, server se schr\u00e1nkami u ka\u017ed\u00e9 z nich, aplikace, kter\u00e9 odes\u00edlaj\u00ed po\u0161tu jm\u00e9nem dom\u00e9ny.<\/li><li>P\u0159\u00edprava br\u00e1ny jej\u00edm poskytovatelem: p\u0159ij\u00edman\u00e9 dom\u00e9ny, doru\u010dovac\u00ed server, v\u00fdchoz\u00ed pravidla.<\/li><li>Nastaven\u00ed br\u00e1ny v e-mailov\u00e9m syst\u00e9mu (p\u0159\u00edchoz\u00ed konektor nebo p\u0159\u00edchoz\u00ed br\u00e1na), pokud to platforma umo\u017e\u0148uje.<\/li><li>P\u0159edem sn\u00ed\u017eit TTL z\u00e1znamu MX, pak MX zm\u011bnit. Po dobu platnosti mezipam\u011bti DNS doru\u010duje \u010d\u00e1st odes\u00edlatel\u016f st\u00e1le p\u0159\u00edmo na server se schr\u00e1nkami: to je norm\u00e1ln\u00ed.<\/li><li>Kontrola: zpr\u00e1va odeslan\u00e1 z extern\u00ed adresy mus\u00ed doraz\u00edt s rozhodovac\u00edmi hlavi\u010dkami br\u00e1ny.<\/li><li>Sledov\u00e1n\u00ed karant\u00e9ny v prvn\u00edch dnech, aby bylo mo\u017en\u00e9 uvolnit fale\u0161n\u00e9 poplachy a upravit pravidla.<\/li><\/ol><p>N\u00e1vrat zp\u011bt je jednoduch\u00fd: vr\u00e1tit p\u016fvodn\u00ed MX. P\u0159ipravuje se jako u migrace, s osobou, kter\u00e1 je opr\u00e1vn\u011bna o n\u011bm rozhodnout.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-318ae3c elementor-widget elementor-widget-text-editor\" data-id=\"318ae3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Co br\u00e1na ned\u011bl\u00e1<\/h2><p>Vid\u00ed po\u0161tu, kter\u00e1 j\u00ed proch\u00e1z\u00ed, a jen ji. Nevid\u00ed zpr\u00e1vy vym\u011bn\u011bn\u00e9 mezi dv\u011bma schr\u00e1nkami t\u00e9\u017ee platformy, kter\u00e9 ji neopou\u0161t\u011bj\u00ed, ani soubory sd\u00edlen\u00e9 v online \u00falo\u017ei\u0161ti, ani p\u0159ihla\u0161ov\u00e1n\u00ed u\u017eivatel\u016f.<\/p><p>Nenahrazuje tedy intern\u00ed nastaven\u00ed Microsoft 365 nebo Google Workspace: pr\u00e1va, dvoufaktorov\u00e9 ov\u011b\u0159en\u00ed, upozorn\u011bn\u00ed na p\u0159ihl\u00e1\u0161en\u00ed, pravidla automatick\u00e9ho p\u0159eposl\u00edl\u00e1n\u00ed. Ukraden\u00fd \u00fa\u010det je v prvn\u00ed \u0159ad\u011b v\u011bc\u00ed e-mailov\u00e9ho syst\u00e9mu. Pr\u016fvodce <a href='\/cs\/spam-phishing-malware-kompromitovany-ucet\/'>spam, phishing, malware a kompromitovan\u00fd \u00fa\u010det<\/a> v\u011bci rozli\u0161uje.<\/p><p>A kone\u010dn\u011b: odes\u00edlatel, kter\u00fd zn\u00e1 technickou adresu serveru se schr\u00e1nkami, se m\u016f\u017ee pokusit doru\u010dit na n\u011bj p\u0159\u00edmo, mimo MX. To je d\u016fvod uzam\u010den\u00ed, kter\u00e9 nab\u00edz\u00ed Microsoft (partnersk\u00fd konektor) a Google (odm\u00edt\u00e1n\u00ed po\u0161ty mimo br\u00e1nu).<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4585de7 elementor-widget elementor-widget-text-editor\" data-id=\"4585de7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>\u010cast\u00e9 dotazy<\/h2><h3>M\u00e1me informovat u\u017eivatele?<\/h3><p>Jejich adresy se nem\u011bn\u00ed. Upozorn\u011bte je ale, \u017ee mohou dost\u00e1vat ozn\u00e1men\u00ed o karant\u00e9n\u011b: viz <a href='\/cs\/karantena-falesne-poplachy\/'>Karant\u00e9na, fale\u0161n\u00e9 poplachy a hl\u00e1\u0161en\u00ed<\/a>.<\/p><h3>M\u00e1me vypnout filtr Microsoft 365 nebo Google?<\/h3><p>Ne. Microsoft doporu\u010duje ponechat jeho anal\u00fdzu zapnutou a nastavit ji tak, aby vid\u011bla skute\u010dn\u00e9ho odes\u00edlatele, m\u00edsto aby se obch\u00e1zela.<\/p><h3>Jak dlouho p\u0159epnut\u00ed trv\u00e1?<\/h3><p>Samotn\u00e1 zm\u011bna MX se projev\u00ed tempem mezipam\u011bti DNS. P\u0159\u00edprava z\u00e1vis\u00ed na po\u010dtu dom\u00e9n a server\u016f. Pro Klytic MTA viz n\u00e1sleduj\u00edc\u00ed odd\u00edl.<\/p><h3>M\u011bn\u00ed br\u00e1na um\u00edst\u011bn\u00e1 vp\u0159edu doru\u010ditelnost na\u0161ich odes\u00edlan\u00fdch zpr\u00e1v?<\/h3><p>Jen pokud p\u0159ed\u00e1v\u00e1 i odch\u00e1zej\u00edc\u00ed po\u0161tu. V tom p\u0159\u00edpad\u011b s n\u00ed mus\u00ed po\u010d\u00edtat SPF a DKIM: viz <a href='\/cs\/spf-dkim-dmarc-ochrana-domeny\/'>SPF, DKIM a DMARC<\/a>.<\/p><h3>Pro\u010d prost\u011b nezm\u011bnit e-mailov\u00fd syst\u00e9m?<\/h3><p>To je jin\u00e9 rozhodnut\u00ed, s jin\u00fdmi krit\u00e9rii. Zab\u00fdv\u00e1 se j\u00edm pr\u016fvodce <a href='\/cs\/evropsky-firemni-e-mail\/'>jak vybrat evropsk\u00fd firemn\u00ed e-mail<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e4a325 kly-g-klytic elementor-widget elementor-widget-text-editor\" data-id=\"5e4a325\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Kde se nach\u00e1z\u00ed Klytic<\/h2><p><a href='\/cs\/klytic-mta\/'>Klytic MTA<\/a> se um\u00eds\u0165uje p\u0159ed e-mailov\u00fd syst\u00e9m, kter\u00fd m\u00e1te: Microsoft 365, Google Workspace, Exchange, Klytic Mail nebo jak\u00fdkoli jin\u00fd server. Nep\u0159edpokl\u00e1d\u00e1 schr\u00e1nku Klytic.<\/p><ul><li><strong>Uveden\u00ed do provozu<\/strong>: obvykle 24 a\u017e 48 hodin. Klytic p\u0159iprav\u00ed konfiguraci; vy uprav\u00edte z\u00e1znam MX sv\u00e9 dom\u00e9ny, nebo to Klytic ud\u011bl\u00e1 za v\u00e1s. Nastaven\u00ed br\u00e1ny v konzoli Microsoft 365 nebo Google Workspace prov\u00e1d\u00ed administr\u00e1tor tohoto e-mailov\u00e9ho syst\u00e9mu a p\u0159ipravuje se s Klytic p\u0159i uveden\u00ed do provozu.<\/li><li><strong>Nasazen\u00ed<\/strong>: cloud Klytic, dedikovan\u00e1 instance nebo servery z\u00e1kazn\u00edka. Pro zvl\u00e1\u0161tn\u00ed pot\u0159eby lze s Klytic navrhnout i jin\u00e9 architektury, nap\u0159\u00edklad filtrov\u00e1n\u00ed v cloudu a relay nainstalovan\u00fd u v\u00e1s, nebo v\u00edce region\u016f.<\/li><li><strong>Nab\u00eddky<\/strong>: Essential a Advanced. Essential pokr\u00fdv\u00e1 ov\u011b\u0159en\u00ed, antispam, antivirus, phishing, podobn\u00e9 dom\u00e9ny, karant\u00e9nu, podpis DKIM odes\u00edlan\u00fdch zpr\u00e1v a zastaven\u00ed zpr\u00e1vy p\u0159ed odesl\u00e1n\u00edm. Advanced p\u0159id\u00e1v\u00e1 finan\u010dn\u00ed podvody, ochranu p\u0159i kliknut\u00ed, konzoli DMARC a export protokol\u016f do SIEM.<\/li><li><strong>Zku\u0161ebn\u00ed verze<\/strong>: 30 dn\u00ed zdarma, beze zm\u011bny e-mailov\u00e9ho syst\u00e9mu.<\/li><\/ul><p>Klytic MTA nespravuje pr\u00e1va ani \u00fa\u010dty va\u0161eho sou\u010dasn\u00e9ho e-mailov\u00e9ho syst\u00e9mu a nesl\u00edbuje rovnocennost s bezpe\u010dnostn\u00edmi n\u00e1stroji vestav\u011bn\u00fdmi do Microsoft 365 nebo Google Workspace: p\u0159id\u00e1v\u00e1 se p\u0159ed n\u011b.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6258d8b kly-g-disclaimer elementor-widget elementor-widget-text-editor\" data-id=\"6258d8b\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Tato str\u00e1nka popisuje princip. Konzole Microsoftu a Googlu se vyv\u00edjej\u00ed: pro konkr\u00e9tn\u00ed postup je rozhoduj\u00edc\u00ed jejich ofici\u00e1ln\u00ed dokumentace.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-194a645 kly-g-sources elementor-widget elementor-widget-text-editor\" data-id=\"194a645\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>Zdroje<\/h2><p>Ov\u011b\u0159eno v \u0159\u00edjnu 2026.<\/p><ul><li>Microsoft Learn, \u201eManage mail flow using a third-party cloud service with Exchange Online\u201c: MX mus\u00ed ur\u010dovat slu\u017ebu t\u0159et\u00ed strany; p\u0159\u00edchoz\u00ed konektor typu partner; roz\u0161\u00ed\u0159en\u00e9 filtrov\u00e1n\u00ed pro konektory m\u00edsto obch\u00e1zen\u00ed filtrov\u00e1n\u00ed. <a href='https:\/\/learn.microsoft.com\/en-us\/exchange\/mail-flow-best-practices\/manage-mail-flow-using-third-party-cloud' rel='noopener' target='_blank'>learn.microsoft.com<\/a><\/li><li>N\u00e1pov\u011bda Google Workspace, \u201eSet up an inbound mail gateway\u201c: MX sm\u011brem na br\u00e1nu, zad\u00e1n\u00ed jej\u00edch IP adres, mo\u017en\u00e9 odm\u00edt\u00e1n\u00ed po\u0161ty mimo br\u00e1nu; Gmail neuplat\u0148uje politiku DMARC odes\u00edlatele na po\u0161tu p\u0159ijatou p\u0159es br\u00e1nu. <a href='https:\/\/knowledge.workspace.google.com\/admin\/gmail\/advanced\/set-up-an-inbound-mail-gateway' rel='noopener' target='_blank'>knowledge.workspace.google.com<\/a><\/li><li>RFC 5321, SMTP: mezil\u00e9hl\u00e9 hostitele obvykle ur\u010duje z\u00e1znam MX v DNS. <a href='https:\/\/www.rfc-editor.org\/rfc\/rfc5321' rel='noopener' target='_blank'>rfc-editor.org<\/a><\/li><li>Klytic, str\u00e1nka Klytic MTA: moduly nab\u00eddek Essential a Advanced, dopl\u0148ky, zp\u016fsoby nasazen\u00ed, uveden\u00ed do provozu zm\u011bnou MX. <a href='https:\/\/www.klytic.com\/klytic-mta\/' rel='noopener' target='_blank'>klytic.com<\/a><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1f6d11d e-con-full kly-g-aside e-flex e-con e-parent\" data-id=\"1f6d11d\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c4eeec3 elementor-widget elementor-widget-html\" data-id=\"c4eeec3\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"html.default\">\n\t\t\t\t\t<nav class=\"kly-g-toc\" aria-label=\"Na t\u00e9to str\u00e1nce\"><p>Na t\u00e9to str\u00e1nce<\/p><ol><\/ol><\/nav>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bc6f9a7 elementor-widget elementor-widget-text-editor\" data-id=\"bc6f9a7\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<div class=\"kly-g-cta\"><h3>Ochra\u0148te sv\u016fj sou\u010dasn\u00fd e-mailov\u00fd syst\u00e9m<\/h3><p>30denn\u00ed zku\u0161ebn\u00ed verze zdarma, beze zm\u011bny e-mailov\u00e9ho syst\u00e9mu: m\u011bn\u00ed se jen MX.<\/p><p><a class=\"kly-g-btn\" href=\"\/cs\/kontakt\/\">Promluvit s poradcem \u2192<\/a><\/p><p style=\"margin:0\"><a class=\"kly-g-btn ghost\" href=\"\/cs\/klytic-mta\/\">Objevte Klytic MTA<\/a><\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ba83c16 e-con-full kly-g-related e-flex e-con e-parent\" data-id=\"ba83c16\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;ekit_has_onepagescroll_dot&quot;:&quot;yes&quot;}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b658358 elementor-widget elementor-widget-text-editor\" data-id=\"b658358\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;ekit_we_effect_on&quot;:&quot;none&quot;}\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h2>P\u0159e\u010dt\u011bte si tak\u00e9<\/h2><div class=\"kly-g-grid\"><a class=\"kly-g-card\" href=\"\/cs\/bezpecnostni-brana-e-mailu\/\" style=\"--cat:#dc2626\"><span class=\"c\">Pochopit \u00b7 Zabezpe\u010den\u00ed e-mail\u016f<\/span><span class=\"t\">Vestav\u011bn\u00fd filtr, nebo bezpe\u010dnostn\u00ed br\u00e1na p\u0159ed e-mailov\u00fdm syst\u00e9mem<\/span><span class=\"q\">Filtr e-mailov\u00e9ho syst\u00e9mu chr\u00e1n\u00ed pr\u00e1v\u011b tento syst\u00e9m. Br\u00e1na p\u0159ij\u00edm\u00e1 po\u0161tu dom\u00e9ny, analyzuje ji a pak doru\u010d\u00ed: kam ji um\u00edstit a co uchov\u00e1v\u00e1.<\/span><span class=\"m\"><span>7 min \u010dten\u00ed<\/span><b>\u010c\u00edst \u2192<\/b><\/span><\/a><a class=\"kly-g-card\" href=\"\/cs\/spf-dkim-dmarc-ochrana-domeny\/\" style=\"--cat:#dc2626\"><span class=\"c\">Pochopit \u00b7 Zabezpe\u010den\u00ed e-mail\u016f<\/span><span class=\"t\">SPF, DKIM a DMARC: co chr\u00e1n\u00ed a co nechr\u00e1n\u00ed<\/span><span class=\"q\">SPF, DKIM a DMARC br\u00e1n\u00ed pou\u017eit\u00ed p\u0159esn\u011b va\u0161\u00ed dom\u00e9ny. Zpr\u00e1vu ne\u010dtou: co zastav\u00ed, co projde a jak je zav\u00e9st.<\/span><span class=\"m\"><span>6 min \u010dten\u00ed<\/span><b>\u010c\u00edst \u2192<\/b><\/span><\/a><a class=\"kly-g-card\" href=\"\/cs\/migrace-e-mailu-bez-preruseni\/\" style=\"--cat:#0077cc\"><span class=\"c\">P\u0159\u00edru\u010dky<\/span><span class=\"t\">Jak migrovat firemn\u00ed e-mail bez p\u0159eru\u0161en\u00ed provozu?<\/span><span class=\"q\">Soub\u011bh platforem, druh\u00fd pr\u016fchod, TTL z\u00e1znamu MX, SPF, DKIM, DMARC a zku\u0161ebn\u00ed odesl\u00e1n\u00ed: jak zm\u011bnit e-mailovou slu\u017ebu bez ztr\u00e1ty po\u0161ty a co z\u016fstane viditeln\u00e9.<\/span><span class=\"m\"><span>P\u0159\u00edru\u010dky<\/span><b>\u010c\u00edst \u2192<\/b><\/span><\/a><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-539316dd e-con e-atomic-element e-div-block-base e-default-div e-c9fd865-4a50 \" data-id=\"539316dd\" data-element_type=\"e-div-block\" data-e-type=\"e-div-block\" data-interaction-id=\"539316dd\" data-e-type=\"e-div-block\" data-id=\"539316dd\">\n    <div class=\"elementor-element elementor-element-4f79afcb e-con e-atomic-element e-div-block-base e-default-div e-4fa9fe-ce86 \" data-id=\"4f79afcb\" data-element_type=\"e-div-block\" data-e-type=\"e-div-block\" data-interaction-id=\"4f79afcb\" data-e-type=\"e-div-block\" data-id=\"4f79afcb\">\n    \t\t\t<p class=\"e-4dcf5c70-2ec7 e-paragraph-base e-default-p\" data-interaction-id=\"330a7a35\" data-e-type=\"widget\" data-id=\"330a7a35\">Uv\u00edtac\u00ed nab\u00eddka<\/p>\n\t\t\t\t\t<h2 data-interaction-id=\"56f1f7d5\" class=\"e-347faa43-4e20 e-heading-base e-default-h2\" data-e-type=\"widget\" data-id=\"56f1f7d5\">30 dn\u00ed zku\u0161ebn\u00ed verze zdarma a migrace s asistenc\u00ed<\/h2>\n\t\t\t\t\t<p class=\"e-7f6310da-1caa e-paragraph-base e-default-p\" data-interaction-id=\"2ce27288\" data-e-type=\"widget\" data-id=\"2ce27288\">Zku\u0161ebn\u00ed nab\u00eddka bez z\u00e1vazk\u016f. N\u00e1\u0161 poradce v\u00e1m zavol\u00e1, aby poznal va\u0161e pot\u0159eby a p\u0159ipravil va\u0161e prost\u0159ed\u00ed Klytic.<\/p>\n\t\t<div class=\"elementor-element elementor-element-35ea29a1 e-con e-atomic-element e-div-block-base e-default-div e-1cd48b22-e6da \" data-id=\"35ea29a1\" data-element_type=\"e-div-block\" data-e-type=\"e-div-block\" data-interaction-id=\"35ea29a1\" data-e-type=\"e-div-block\" data-id=\"35ea29a1\">\n    \t\t\t<a href=\"\/essai-gratuit\/\" target=\"_self\" class=\"e-4a7886e3-652d e-button-base e-default-a\" data-interaction-id=\"19bfa8f1\" data-e-type=\"widget\" data-id=\"19bfa8f1\">\n\t\ud83d\ude80 Zah\u00e1jit zku\u0161ebn\u00ed verzi zdarma\n<\/a>\n\t\t\t\t\t<a href=\"\/tarifs\/\" target=\"_self\" class=\"e-137e863d-dd0d e-button-base e-default-a\" data-interaction-id=\"326d82ab\" data-e-type=\"widget\" data-id=\"326d82ab\">\n\tZobrazit cen\u00edk\n<\/a>\n\t\t\n<\/div>\n\n<\/div>\n\n<\/div>\n\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_seopress_titles_title":"Ochrana Microsoft 365 nebo Google beze zm\u011bny serveru | Klytic","_seopress_titles_desc":"P\u0159id\u00e1n\u00ed bezpe\u010dnostn\u00ed br\u00e1ny p\u0159ed Microsoft 365, Google Workspace nebo Exchange: MX, nastaven\u00ed v e-mailov\u00e9m syst\u00e9mu, SPF\/DKIM\/DMARC a omezen\u00ed.","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"Ochrana Microsoft 365 nebo Google beze zm\u011bny serveru | Klytic","_seopress_social_fb_desc":"P\u0159id\u00e1n\u00ed bezpe\u010dnostn\u00ed br\u00e1ny p\u0159ed Microsoft 365, Google Workspace nebo Exchange: MX, nastaven\u00ed v e-mailov\u00e9m syst\u00e9mu, SPF\/DKIM\/DMARC a omezen\u00ed.","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"Ochrana Microsoft 365 nebo Google beze zm\u011bny serveru | Klytic","_seopress_social_twitter_desc":"P\u0159id\u00e1n\u00ed bezpe\u010dnostn\u00ed br\u00e1ny p\u0159ed Microsoft 365, Google Workspace nebo Exchange: MX, nastaven\u00ed v e-mailov\u00e9m syst\u00e9mu, SPF\/DKIM\/DMARC a omezen\u00ed.","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"","_seopress_news_disabled":"","_seopress_video_disabled":"","_seopress_video":[],"_seopress_pro_schemas_manual":[],"_seopress_pro_rich_snippets_disable_all":"","_seopress_pro_rich_snippets_disable":[],"_seopress_pro_schemas":[],"footnotes":""},"class_list":["post-7458","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/pages\/7458","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/comments?post=7458"}],"version-history":[{"count":0,"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/pages\/7458\/revisions"}],"wp:attachment":[{"href":"https:\/\/eu.klytic.com\/cs\/wp-json\/wp\/v2\/media?parent=7458"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}