{"id":2970,"date":"2026-10-21T10:00:00","date_gmt":"2026-10-21T07:00:00","guid":{"rendered":"https:\/\/narhost.com\/destek\/?p=2970"},"modified":"2026-10-21T10:00:00","modified_gmt":"2026-10-21T07:00:00","slug":"550-5-7-26-hatasi","status":"publish","type":"post","link":"https:\/\/narhost.com\/destek\/550-5-7-26-hatasi\/","title":{"rendered":"550 5.7.26 Kimlik Do\u011frulama Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr (Gmail&#8217;e Giden E-posta)"},"content":{"rendered":"<p class=\"kb-dogrulama\">Son do\u011frulama: Ekim 2026 \u00b7 cPanel 136 test hesab\u0131nda denendi<\/p>\n<div id=\"hizli-cozum\" class=\"ai-box ai-box--cozum\">\n<p class=\"ai-box-title\">H\u0131zl\u0131 \u00e7\u00f6z\u00fcm<\/p>\n<p><strong>550 5.7.26 hatas\u0131<\/strong> (<code>550 5.7.26 This mail has been blocked because the sender is unauthenticated<\/code> ya da <code>does not pass authentication checks<\/code>), Gmail&#8217;in iletinizi g\u00f6nderen alan ad\u0131n\u0131 do\u011frulayamad\u0131\u011f\u0131 i\u00e7in reddetti\u011fini g\u00f6sterir. \u00c7\u00f6z\u00fcm alan ad\u0131na SPF ve DKIM kayd\u0131 eklemektir.<\/p>\n<ol>\n<li><strong>cPanel \u2192 E-posta \u2192 Email Deliverability<\/strong> sayfas\u0131n\u0131 a\u00e7\u0131n.<\/li>\n<li>Alan ad\u0131n\u0131n yan\u0131ndaki <strong>Repair<\/strong> d\u00fc\u011fmesiyle SPF ve DKIM kay\u0131tlar\u0131n\u0131 d\u00fczeltin.<\/li>\n<li>Alan ad\u0131n\u0131n DNS&#8217;i ba\u015fka bir yerde (\u00f6r. Cloudflare) ise kay\u0131tlar\u0131 oraya elle ekleyin.<\/li>\n<li>Bir DMARC kayd\u0131 ekleyin, ard\u0131ndan Gmail&#8217;de iletinin kayna\u011f\u0131nda \u00fc\u00e7 sonucun <code>PASS<\/code> oldu\u011funu kontrol edin.<\/li>\n<\/ol>\n<\/div>\n<table class=\"kb-uyg\">\n<tr>\n<th>Panel<\/th>\n<td>cPanel (Email Deliverability, B\u00f6lge Edit\u00f6r\u00fc)<\/td>\n<\/tr>\n<tr>\n<th>Sistem<\/th>\n<td>Payla\u015f\u0131ml\u0131 hosting<\/td>\n<\/tr>\n<tr>\n<th>Yetki<\/th>\n<td>cPanel kullan\u0131c\u0131s\u0131; DNS ba\u015fka yerdeyse o panelin yetkisi<\/td>\n<\/tr>\n<tr>\n<th>Narhost \u00fcr\u00fcn\u00fc<\/th>\n<td><a href=\"https:\/\/narhost.com\/kurumsal-e-posta\" title=\"Narhost Kurumsal E-posta paketleri\">Kurumsal E-posta<\/a>, Web Hosting<\/td>\n<\/tr>\n<\/table>\n<div class=\"kb-once\">\n<p class=\"label\">Ba\u015flamadan \u00f6nce<\/p>\n<ul>\n<li>Geri d\u00f6nen iletinin tam metnini kaydedin; hata kodunun yan\u0131ndaki a\u00e7\u0131klama hangi kontrol\u00fcn ba\u015far\u0131s\u0131z oldu\u011funu s\u00f6yler.<\/li>\n<li>Alan ad\u0131n\u0131n ad sunucular\u0131n\u0131n nerede oldu\u011funu \u00f6\u011frenin: Narhost (<code>ln1.narhost.com<\/code>, <code>ln2.narhost.com<\/code>) m\u0131, ba\u015fka bir DNS sa\u011flay\u0131c\u0131s\u0131 m\u0131.<\/li>\n<li>Sitenizin ileti\u015fim formu ya da b\u00fclten arac\u0131 ba\u015fka bir sunucudan e-posta g\u00f6nderiyorsa onlar\u0131 da listeleyin.<\/li>\n<\/ul>\n<\/div>\n<h2>550 5.7.26 hatas\u0131 neden olur<\/h2>\n<p>Google&#8217;\u0131n <a href=\"https:\/\/support.google.com\/mail\/answer\/81126\" title=\"Google \u2014 Gmail&#039;e e-posta g\u00f6nderenler i\u00e7in y\u00f6nergeler\" target=\"_blank\" rel=\"noopener\">g\u00f6nderici y\u00f6nergeleri<\/a> 1 \u015eubat 2024&#8217;ten beri Gmail&#8217;e ileti g\u00f6nderen herkesten SPF ya da DKIM ile kimlik do\u011frulamas\u0131 istiyor; g\u00fcnde 5.000&#8217;den fazla ileti g\u00f6nderenlerden \u00fc\u00e7\u00fcn\u00fc birden, yani SPF, DKIM ve DMARC&#8217;\u0131 bekliyor. Do\u011frulanamayan ileti spam klas\u00f6r\u00fcne d\u00fc\u015febilir ya da 5.7.26 koduyla reddedilir.<\/p>\n<p>Hatan\u0131n iki s\u0131k t\u00fcr\u00fc vard\u0131r. Birincisinde alan ad\u0131nda SPF ya da DKIM kayd\u0131 hi\u00e7 yoktur veya yanl\u0131\u015ft\u0131r. \u0130kincisinde kay\u0131tlar vard\u0131r ama ileti, SPF&#8217;de izin verilmemi\u015f bir sunucudan \u00e7\u0131kar; \u00f6rne\u011fin sitenin ileti\u015fim formu bir e-posta servisinden g\u00f6nderiyordur ya da alan ad\u0131n\u0131n DMARC politikas\u0131 do\u011frulanmayan iletiyi reddetmeyi s\u00f6yler.<\/p>\n<figure class=\"nh-sema\"><img src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/10\/550-5-7-26-hatasi-sema-narhost.webp\" alt=\"550 5.7.26 hatas\u0131 \u00e7\u00f6z\u00fcm \u015femas\u0131 \u2014 SPF, DKIM, DMARC ve Gmail&#x27;de do\u011frulama\" width=\"1200\" height=\"500\" loading=\"lazy\" decoding=\"async\"><figcaption>\u00dc\u00e7 kayd\u0131n da PASS g\u00f6stermesi iletinin kabul edilece\u011fi anlam\u0131na gelir.<\/figcaption><\/figure>\n<h2>Ad\u0131m ad\u0131m \u00e7\u00f6z\u00fcm<\/h2>\n<ol class=\"kb-adimlar\">\n<li><strong>cPanel \u2192 E-posta \u2192 Email Deliverability<\/strong> sayfas\u0131n\u0131 a\u00e7\u0131n. Her alan ad\u0131n\u0131n sat\u0131r\u0131nda <strong>Email Deliverability Status<\/strong> s\u00fctunu teslim durumunu ve sorunlu kayd\u0131 g\u00f6sterir.<br \/>\n<figure class=\"kb-ekran\"><img decoding=\"async\" src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/10\/550-5-7-26-hatasi-adim-1.webp\" alt=\"550 5.7.26 hatas\u0131 i\u00e7in cPanel Email Deliverability ekran\u0131nda SPF ve DKIM durumu\" width=\"1200\" height=\"425\" loading=\"lazy\"><figcaption>Alan ad\u0131n\u0131n sat\u0131r\u0131 e-posta teslim durumunu ve hatal\u0131 kayd\u0131 g\u00f6sterir.<\/figcaption><\/figure>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: sorunlu alan ad\u0131n\u0131n sat\u0131r\u0131 k\u0131rm\u0131z\u0131 g\u00f6r\u00fcn\u00fcr ve hangi kayd\u0131n hatal\u0131 oldu\u011fu yazar (\u00f6rne\u011fin <code>DNS Errors Occurred (DMARC)<\/code>); yan\u0131nda <strong>Repair<\/strong> ve <strong>Y\u00f6net<\/strong> d\u00fc\u011fmeleri bulunur.<\/p>\n<\/li>\n<li><strong>Kay\u0131tlar\u0131 onar\u0131n.<\/strong><strong>Repair<\/strong> d\u00fc\u011fmesine bas\u0131n, \u00f6nerilen SPF ve DKIM kay\u0131tlar\u0131n\u0131 onaylay\u0131n. Ad sunucular\u0131n\u0131z Narhost&#8217;taysa cPanel kay\u0131tlar\u0131 DNS b\u00f6lgesine kendisi yazar.\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: alan ad\u0131n\u0131n durumu hatas\u0131z g\u00f6r\u00fcn\u00fcr. Repair d\u00fc\u011fmesi soluksa sorun DMARC gibi cPanel&#8217;in kendili\u011finden yazmad\u0131\u011f\u0131 bir kay\u0131ttad\u0131r; be\u015finci ad\u0131ma ge\u00e7in.<\/p>\n<\/li>\n<li><strong>DNS ba\u015fka yerdeyse kay\u0131tlar\u0131 elle ekleyin.<\/strong> Email Deliverability ekran\u0131ndaki <strong>Y\u00f6net<\/strong> d\u00fc\u011fmesi \u00f6nerilen kay\u0131tlar\u0131n tam de\u011ferini g\u00f6sterir. Bu de\u011ferleri DNS sa\u011flay\u0131c\u0131n\u0131z\u0131n paneline TXT kayd\u0131 olarak girin. Ad\u0131mlar <a href=\"https:\/\/narhost.com\/destek\/spf-kaydi-nasil-eklenir\/\" title=\"SPF Kayd\u0131 Nas\u0131l Eklenir \u2014 Narhost Destek Merkezi\">SPF kayd\u0131 nas\u0131l eklenir<\/a> ve <a href=\"https:\/\/narhost.com\/destek\/dkim-kaydi-nasil-eklenir\/\" title=\"DKIM Kayd\u0131 Nas\u0131l Eklenir \u2014 Narhost Destek Merkezi\">DKIM kayd\u0131 nas\u0131l eklenir<\/a> kartlar\u0131nda.<\/li>\n<li><strong>Di\u011fer g\u00f6nderen sunucular\u0131 SPF&#8217;ye ekleyin.<\/strong> Form ya da b\u00fclten arac\u0131 ba\u015fka bir servisten g\u00f6nderiyorsa, o servisin verdi\u011fi <code>include:<\/code> ifadesini ayn\u0131 SPF kayd\u0131na ekleyin. Bir alan ad\u0131nda yaln\u0131z bir SPF kayd\u0131 bulunmal\u0131d\u0131r:\n<pre><code class=\"language-bash\">v=spf1 +a +mx include:servis-ornegi.com ~all<\/code><\/pre>\n<\/li>\n<li><strong>DMARC kayd\u0131 ekleyin.<\/strong><strong>B\u00f6lge Edit\u00f6r\u00fc<\/strong>&#8216;nde <code>_dmarc<\/code> ad\u0131yla bir TXT kayd\u0131 olu\u015fturun ve izleme politikas\u0131yla ba\u015flay\u0131n:<br \/>\n<figure class=\"kb-ekran\"><img decoding=\"async\" src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/10\/550-5-7-26-hatasi-adim-2.webp\" alt=\"cPanel B\u00f6lge Edit\u00f6r\u00fc \u2014 DMARC i\u00e7in TXT kayd\u0131 ekleme\" width=\"1200\" height=\"440\" loading=\"lazy\"><figcaption>DMARC kayd\u0131 B\u00f6lge Edit\u00f6r\u00fc&#8217;nde alan ad\u0131n\u0131n Y\u00f6net ba\u011flant\u0131s\u0131ndan eklenir.<\/figcaption><\/figure>\n<pre><code class=\"language-bash\">v=DMARC1; p=none; rua=mailto:dmarc@ornek.com<\/code><\/pre>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: kay\u0131t DNS&#8217;te yay\u0131ld\u0131ktan sonra Gmail DMARC sonucunu <code>PASS<\/code> olarak g\u00f6sterir. Ayr\u0131nt\u0131lar <a href=\"https:\/\/narhost.com\/destek\/dmarc-kaydi-nasil-olusturulur\/\" title=\"DMARC Kayd\u0131 Nas\u0131l Olu\u015fturulur \u2014 Narhost Destek Merkezi\">DMARC kayd\u0131 nas\u0131l olu\u015fturulur<\/a> kart\u0131nda.<\/p>\n<\/li>\n<\/ol>\n<h2>Do\u011frulama<\/h2>\n<div class=\"success-box\">\n<p class=\"label\">Sonu\u00e7<\/p>\n<p>Kendi alan ad\u0131n\u0131zdan bir Gmail adresine test iletisi g\u00f6nderin. Gmail&#8217;de iletiyi a\u00e7\u0131p \u00fc\u00e7 nokta men\u00fcs\u00fcnden <strong>Orijinali g\u00f6ster<\/strong>&#8216;i se\u00e7in; <a href=\"https:\/\/support.google.com\/mail\/answer\/29436\" title=\"Google \u2014 Gmail&#039;de ileti ba\u015fl\u0131klar\u0131n\u0131 g\u00f6r\u00fcnt\u00fcleme\" target=\"_blank\" rel=\"noopener\">Google&#8217;\u0131n yard\u0131m sayfas\u0131<\/a> bu ekran\u0131 anlat\u0131r. SPF, DKIM ve DMARC sat\u0131rlar\u0131n\u0131n \u00fc\u00e7\u00fc de <code>PASS<\/code> g\u00f6steriyorsa 550 5.7.26 hatas\u0131 giderilmi\u015ftir.<\/p>\n<\/div>\n<h2>H\u00e2l\u00e2 \u00e7\u00f6z\u00fclmediyse<\/h2>\n<ul>\n<li><strong>Hata yaln\u0131z ileti\u015fim formundan gelen iletilerde.<\/strong> Form PHP mail ile g\u00f6nderiyordur; kimlik do\u011frulamal\u0131 SMTP&#8217;ye ge\u00e7mek i\u00e7in <a href=\"https:\/\/narhost.com\/destek\/wordpress-mail-gonderme-sorunu\/\" title=\"WordPress Mail G\u00f6nderme Sorunu \u2014 Narhost Destek Merkezi\">WordPress mail g\u00f6nderme sorunu<\/a> kart\u0131na bak\u0131n.<\/li>\n<li><strong>G\u00f6nderici adresi do\u011frulanam\u0131yor deniyor.<\/strong> Hata farkl\u0131 bir kontrolden geliyordur; <a href=\"https:\/\/narhost.com\/destek\/550-sender-verify-failed-hatasi\/\" title=\"550 Sender Verify Failed Hatas\u0131 \u2014 Narhost Destek Merkezi\">550 sender verify failed hatas\u0131<\/a> kart\u0131 ge\u00e7erlidir.<\/li>\n<li><strong>\u0130leti reddedilmiyor ama spama d\u00fc\u015f\u00fcyor.<\/strong> Kimlik do\u011frulama tamamsa i\u00e7erik ve itibar kontrol edilir; <a href=\"https:\/\/narhost.com\/destek\/mail-spam-sorunu-nasil-cozulur\/\" title=\"Mail Spam Sorunu Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr \u2014 Narhost Destek Merkezi\">mail spam sorunu<\/a> kart\u0131ndaki ad\u0131mlar\u0131 uygulay\u0131n.<\/li>\n<\/ul>\n<div class=\"cta-box\">\n<p class=\"label\">Narhost deste\u011fi<\/p>\n<p>Talebe \u015funlar\u0131 ekleyin: alan ad\u0131, geri d\u00f6nen iletinin tam metni, g\u00f6nderim tarihi ve saati, alan ad\u0131n\u0131n DNS&#8217;inin nerede y\u00f6netildi\u011fi, iletinin hangi programdan ya da formdan g\u00f6nderildi\u011fi.<\/p>\n<p><a class=\"cta-btn\" href=\"https:\/\/narhost.com\/submitticket.php\" title=\"Narhost destek talebi a\u00e7\">Destek talebi a\u00e7<\/a><\/div>\n<div class=\"kb-ilgili\">\n<p class=\"label\">Sonraki ad\u0131mlar<\/p>\n<ul>\n<li><a href=\"https:\/\/narhost.com\/destek\/track-delivery-ile-e-posta-izleme\/\" title=\"Track Delivery ile E-posta \u0130zleme \u2014 Narhost Destek Merkezi\">Track Delivery ile e-posta izleme<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/mail-gonderilemiyorsa-ne-yapmaliyim\/\" title=\"Mail G\u00f6nderilemiyorsa Ne Yapmal\u0131y\u0131m \u2014 Narhost Destek Merkezi\">Mail g\u00f6nderilemiyorsa ne yapmal\u0131y\u0131m<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/e-posta-kurulum-ve-sorun-giderme-rehberi\/\" title=\"E-posta Kurulum ve Sorun Giderme Rehberi \u2014 Narhost Destek Merkezi\">E-posta kurulum ve sorun giderme rehberi<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"kb-faq\">\n<h2>S\u0131k\u00e7a sorulan sorular<\/h2>\n<h3>550 5.7.26 hatas\u0131 yaln\u0131z Gmail&#8217;de mi \u00e7\u0131kar?<\/h3>\n<p>Bu kod ve ileti bi\u00e7imi Gmail&#8217;e \u00f6zg\u00fcd\u00fcr. Di\u011fer b\u00fcy\u00fck e-posta servisleri de do\u011frulanmayan iletiyi reddedebilir ya da spama atabilir, ama farkl\u0131 kod ve iletiyle bildirir. SPF, DKIM ve DMARC kay\u0131tlar\u0131 b\u00fct\u00fcn al\u0131c\u0131lar i\u00e7in ayn\u0131 sorunu \u00e7\u00f6zer.<\/p>\n<h3>G\u00fcnde birka\u00e7 ileti g\u00f6nderiyorum, DMARC \u015fart m\u0131?<\/h3>\n<p>Google, g\u00fcnde 5.000&#8217;in alt\u0131nda g\u00f6nderenler i\u00e7in SPF ya da DKIM&#8217;den birini yeterli say\u0131yor; DMARC toplu g\u00f6ndericilere zorunlu. Yine de \u00fc\u00e7\u00fcn\u00fc birden kurmak iletilerinizin teslim edilme ihtimalini art\u0131r\u0131r ve alan ad\u0131n\u0131z\u0131n taklit edilmesini zorla\u015ft\u0131r\u0131r.<\/p>\n<h3>Kay\u0131tlar\u0131 ekledim, hata h\u00e2l\u00e2 geliyor, ne kadar beklemeliyim?<\/h3>\n<p>DNS de\u011fi\u015fikli\u011finin yay\u0131lmas\u0131 \u00f6nbellek s\u00fcresine g\u00f6re birka\u00e7 dakika ile birka\u00e7 saat s\u00fcrebilir. Kay\u0131tlar\u0131 ekledikten sonra yeni bir test iletisi g\u00f6nderin; eski geri d\u00f6nen iletiler kay\u0131t \u00f6ncesine aittir.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Gmail&#8217;e giden e-postada 550 5.7.26 hatas\u0131n\u0131n nedeni ve \u00e7\u00f6z\u00fcm\u00fc: cPanel Email Deliverability ekran\u0131nda SPF ve DKIM onar\u0131m\u0131, DNS ba\u015fka yerdeyse kay\u0131tlar\u0131 elle ekleme, DMARC kayd\u0131 ve Gmail&#8217;de Orijinali g\u00f6ster ile do\u011frulama.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[213],"class_list":["post-2970","post","type-post","status-publish","format-standard","hentry","category-e-posta","tag-dmarc"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2970","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/comments?post=2970"}],"version-history":[{"count":1,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2970\/revisions"}],"predecessor-version":[{"id":3029,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2970\/revisions\/3029"}],"wp:attachment":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/media?parent=2970"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/categories?post=2970"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/tags?post=2970"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}