{"id":2346,"date":"2026-09-27T15:00:00","date_gmt":"2026-09-27T12:00:00","guid":{"rendered":"https:\/\/narhost.com\/destek\/?p=2346"},"modified":"2026-09-26T23:19:52","modified_gmt":"2026-09-26T20:19:52","slug":"535-incorrect-authentication-data-hatasi","status":"publish","type":"post","link":"https:\/\/narhost.com\/destek\/535-incorrect-authentication-data-hatasi\/","title":{"rendered":"SMTP 535 Incorrect Authentication Data Hatas\u0131 Nas\u0131l \u00c7\u00f6z\u00fcl\u00fcr"},"content":{"rendered":"<p class=\"kb-dogrulama\">Son do\u011frulama: Eyl\u00fcl 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>535 incorrect authentication data<\/strong> hatas\u0131, giden posta sunucusunun (SMTP) kullan\u0131c\u0131 ad\u0131 ve parolan\u0131z\u0131 reddetti\u011fi anlam\u0131na gelir. Sunucuya ula\u015f\u0131yorsunuz ama kimli\u011finiz kabul edilmiyor; sorun neredeyse her zaman istemcideki giri\u015f bilgisidir.<\/p>\n<ol>\n<li>Kullan\u0131c\u0131 ad\u0131na yaln\u0131z <code>info<\/code> de\u011fil, tam adresi yaz\u0131n: <code>info@ornek.com<\/code>.<\/li>\n<li>Parolay\u0131 cPanel&#8217;den yenileyip istemcide hem gelen hem giden sunucu i\u00e7in tekrar girin.<\/li>\n<li>Giden sunucuda kimlik do\u011frulamay\u0131 a\u00e7\u0131k b\u0131rak\u0131n; port <code>465<\/code> ise SSL\/TLS, <code>587<\/code> ise STARTTLS se\u00e7in.<\/li>\n<li>Sunucu ad\u0131n\u0131 cPanel&#8217;deki Connect Devices (Cihaz Ba\u011fla) sayfas\u0131ndan birebir kopyalay\u0131n.<\/li>\n<\/ol>\n<\/div>\n<table class=\"kb-uyg\">\n<tr>\n<th>Panel<\/th>\n<td>cPanel<\/td>\n<\/tr>\n<tr>\n<th>Sistem<\/th>\n<td>Payla\u015f\u0131ml\u0131 hosting (CloudLinux, Exim)<\/td>\n<\/tr>\n<tr>\n<th>Yetki<\/th>\n<td>cPanel kullan\u0131c\u0131s\u0131 ya da e-posta hesab\u0131n\u0131n parolas\u0131<\/td>\n<\/tr>\n<tr>\n<th>Narhost \u00fcr\u00fcn\u00fc<\/th>\n<td><a href=\"https:\/\/narhost.com\/kurumsal-e-posta\" title=\"Kurumsal E-posta - Narhost\">Kurumsal E-posta<\/a><\/td>\n<\/tr>\n<\/table>\n<div class=\"kb-once\">\n<p class=\"label\">Ba\u015flamadan \u00f6nce<\/p>\n<ul>\n<li>Hatay\u0131 veren istemciyi not edin: Outlook, telefon, WordPress SMTP eklentisi ya da kendi yazd\u0131\u011f\u0131n\u0131z uygulama.<\/li>\n<li>cPanel&#8217;e giri\u015f bilgileriniz elinizde olsun; parola yenilemek i\u00e7in gerekir.<\/li>\n<li>Hata mesaj\u0131n\u0131n tam metnini ve saatini kopyalay\u0131n, gerekirse talebe eklersiniz.<\/li>\n<\/ul>\n<\/div>\n<h2>535 hatas\u0131 neden olur<\/h2>\n<p>SMTP oturumunda istemci \u00f6nce sunucuya ba\u011flan\u0131r, ard\u0131ndan <code>AUTH<\/code> komutuyla kullan\u0131c\u0131 ad\u0131 ve parola g\u00f6nderir. Sunucu bu bilgiyi do\u011frulayamazsa oturumu <code>535 Incorrect authentication data<\/code> yan\u0131t\u0131yla keser. Kod, <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc4954\" title=\"RFC 4954 \u2014 SMTP Service Extension for Authentication\" target=\"_blank\" rel=\"noopener\">SMTP kimlik do\u011frulama standard\u0131nda (RFC 4954)<\/a> ge\u00e7ersiz kimlik bilgisi i\u00e7in tan\u0131mlanm\u0131\u015ft\u0131r. Yani port a\u00e7\u0131k, sunucu ad\u0131 do\u011fru, ba\u011flant\u0131 kurulmu\u015f; reddedilen \u015fey kimliktir.<\/p>\n<p>Narhost cPanel sunucular\u0131nda en s\u0131k d\u00f6rt sebep g\u00f6r\u00fcl\u00fcr:<\/p>\n<ul>\n<li><strong>K\u0131sa kullan\u0131c\u0131 ad\u0131.<\/strong> E-posta hesab\u0131nda kullan\u0131c\u0131 ad\u0131 adresin tamam\u0131d\u0131r; <code>info<\/code> ya da cPanel kullan\u0131c\u0131 ad\u0131 kabul edilmez.<\/li>\n<li><strong>Eski parola.<\/strong> Parola cPanel&#8217;den de\u011fi\u015ftirilmi\u015f ama telefonda, Outlook&#8217;ta ya da eklenti ayar\u0131nda eski h\u00e2li kay\u0131tl\u0131 kalm\u0131\u015ft\u0131r.<\/li>\n<li><strong>Giden sunucu i\u00e7in ayr\u0131 bilgi.<\/strong> \u0130stemcide SMTP kimli\u011fi gelen sunucudan farkl\u0131 girilmi\u015f, bo\u015f b\u0131rak\u0131lm\u0131\u015f ya da ba\u015fka bir hesaba ait kalm\u0131\u015ft\u0131r. Kimlik do\u011frulama tamamen kapal\u0131ysa hata genelde 535 de\u011fil, relay reddi olarak d\u00f6ner.<\/li>\n<li><strong>Port ve \u015fifreleme uyumsuzlu\u011fu.<\/strong><code>465<\/code> portunda STARTTLS ya da <code>587<\/code> portunda SSL se\u00e7ilirse baz\u0131 istemciler \u015fifresiz ya da desteklenmeyen bir y\u00f6ntemle giri\u015f dener ve reddedilir.<\/li>\n<\/ul>\n<h2>Ad\u0131m ad\u0131m 535 incorrect authentication data \u00e7\u00f6z\u00fcm\u00fc<\/h2>\n<ol class=\"kb-adimlar\">\n<li><strong>cPanel \u2192 E-posta \u2192 E-posta Hesaplar\u0131<\/strong> sayfas\u0131n\u0131 a\u00e7\u0131n ve hatay\u0131 veren adresin listede oldu\u011funu do\u011frulay\u0131n. Hesap yoksa ya da yan\u0131nda giri\u015f k\u0131s\u0131tlamas\u0131 g\u00f6r\u00fcn\u00fcyorsa sorun istemcide de\u011fil, hesaptad\u0131r.<br \/>\n<figure class=\"kb-ekran\"><img decoding=\"async\" src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/09\/535-incorrect-authentication-data-hatasi-adim-1.webp\" alt=\"535 incorrect authentication data hatas\u0131nda kontrol edilen cPanel E-posta Hesaplar\u0131 listesi\" width=\"1200\" height=\"429\" loading=\"lazy\"><figcaption>E-posta Hesaplar\u0131 sayfas\u0131; parola yenileme ve Connect Devices ba\u011flant\u0131s\u0131 hesab\u0131n sat\u0131r\u0131nda.<\/figcaption><\/figure>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: adres listede g\u00f6r\u00fcn\u00fcr, durum s\u00fctununda k\u0131s\u0131tlama yoktur.<\/p>\n<\/li>\n<li><strong>Parolay\u0131 yenileyin.<\/strong> Hesab\u0131n yan\u0131ndaki Y\u00f6net ba\u011flant\u0131s\u0131ndan yeni bir parola belirleyip kaydedin. Ayr\u0131nt\u0131l\u0131 yol <a href=\"https:\/\/narhost.com\/destek\/cpanel-e-posta-sifresi-degistirme\/\" title=\"cPanel&#039;de E-posta \u015eifresi Nas\u0131l De\u011fi\u015ftirilir - Narhost Destek\">e-posta \u015fifresi de\u011fi\u015ftirme<\/a> kart\u0131nda.\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: parolan\u0131n g\u00fcncellendi\u011fini bildiren ye\u015fil bir uyar\u0131 \u00e7\u0131kar.<\/p>\n<\/li>\n<li><strong>Sunucu ayarlar\u0131n\u0131 Connect Devices sayfas\u0131ndan al\u0131n.<\/strong> Ayn\u0131 sat\u0131rdaki Connect Devices (Cihaz Ba\u011fla) ba\u011flant\u0131s\u0131, hesab\u0131n\u0131za \u00f6zel sunucu ad\u0131n\u0131 ve portlar\u0131 g\u00f6sterir.<br \/>\n<figure class=\"kb-ekran\"><img decoding=\"async\" src=\"https:\/\/narhost.com\/destek\/wp-content\/uploads\/2026\/09\/535-incorrect-authentication-data-hatasi-adim-2.webp\" alt=\"cPanel Connect Devices ekran\u0131nda SMTP sunucu ad\u0131 ve 465, 587 portlar\u0131\" width=\"1200\" height=\"917\" loading=\"lazy\"><figcaption>Connect Devices ekran\u0131; giden sunucu ad\u0131, port ve SSL bilgileri hesaba \u00f6zel listelenir.<\/figcaption><\/figure>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: giden sunucu i\u00e7in <code>465<\/code> (SSL\/TLS) ve <code>587<\/code> (STARTTLS) portlar\u0131 ile hesab\u0131n bulundu\u011fu sunucunun ad\u0131 listelenir.<\/p>\n<\/li>\n<li><strong>\u0130stemciyi d\u00fczeltin.<\/strong> Giden sunucu ayar\u0131nda \u015fu d\u00f6rt de\u011feri birebir girin:\n<pre><code class=\"language-text\">Kullan\u0131c\u0131 ad\u0131 : info@ornek.com\nParola        : cPanel'de belirledi\u011finiz yeni parola\nPort          : 465 (SSL\/TLS) ya da 587 (STARTTLS)\nKimlik do\u011fr.  : Normal parola, gelen sunucuyla ayn\u0131 bilgiler<\/code><\/pre>\n<p class=\"kb-cikti\">Beklenen sonu\u00e7: istemci kaydederken ba\u011flant\u0131y\u0131 s\u0131nar ve hata vermez.<\/p>\n<\/li>\n<li><strong>Uygulama ya da eklentiyse yap\u0131land\u0131rma dosyas\u0131n\u0131 kontrol edin.<\/strong> WordPress SMTP eklentisinde ya da PHP uygulamas\u0131nda parola t\u0131rnak i\u00e7inde, ba\u015ftaki ve sondaki bo\u015fluklar silinmi\u015f olarak yaz\u0131lmal\u0131d\u0131r. \u00d6zel karakterli parolalar baz\u0131 yap\u0131land\u0131rma dosyalar\u0131nda ka\u00e7\u0131\u015f karakteri ister.<\/li>\n<\/ol>\n<h2>Do\u011frulama<\/h2>\n<div class=\"success-box\">\n<p class=\"label\">Sonu\u00e7<\/p>\n<p>Kendi adresinizden ba\u015fka bir servisteki bir posta kutusuna deneme iletisi g\u00f6nderin. \u0130leti giden kutusunda tak\u0131lmadan \u00e7\u0131k\u0131yorsa ve istemci yeniden parola sormuyorsa kimlik do\u011frulama d\u00fczelmi\u015ftir. cPanel&#8217;deki G\u00f6nderimi \u0130zle ekran\u0131nda iletinin teslim edildi\u011fini de g\u00f6rebilirsiniz.<\/p>\n<\/div>\n<h2>H\u00e2l\u00e2 \u00e7\u00f6z\u00fclmediyse<\/h2>\n<ul>\n<li><strong>Webmail&#8217;e girebiliyor, istemciden g\u00f6nderemiyorsunuz.<\/strong> Parola do\u011fru, istemcide giden sunucu i\u00e7in ayr\u0131 bir kimlik kay\u0131tl\u0131d\u0131r. <a href=\"https:\/\/narhost.com\/destek\/smtp-ayarlari-nasil-yapilmali\/\" title=\"SMTP Ayarlar\u0131 Nas\u0131l Yap\u0131lmal\u0131 - Narhost Destek\">SMTP ayarlar\u0131<\/a> kart\u0131ndaki tabloyla tek tek kar\u015f\u0131la\u015ft\u0131r\u0131n.<\/li>\n<li><strong>Hata 535 de\u011fil, relay ya da 550 d\u00f6n\u00fcyor.<\/strong> Kimlik do\u011frulama hi\u00e7 yap\u0131lm\u0131yor ya da al\u0131c\u0131 taraf\u0131 reddediyor; <a href=\"https:\/\/narhost.com\/destek\/mail-gonderilemiyorsa-ne-yapmaliyim\/\" title=\"Mail G\u00f6nderilemiyorsa Ne Yapmal\u0131y\u0131m - Narhost Destek\">mail g\u00f6nderilemiyorsa<\/a> kart\u0131ndaki kod listesine bak\u0131n.<\/li>\n<li><strong>Do\u011fru bilgiyle bile bir s\u00fcre sonra ba\u011flanam\u0131yorsunuz.<\/strong> Arka arkaya \u00e7ok say\u0131da hatal\u0131 deneme, sunucunun kaba kuvvet korumas\u0131n\u0131n IP adresinizi ge\u00e7ici olarak engellemesine yol a\u00e7abilir. Eski parolayla deneme yapan t\u00fcm cihazlar\u0131 kapat\u0131p destek talebi a\u00e7\u0131n.<\/li>\n<\/ul>\n<div class=\"cta-box\">\n<p class=\"label\">Narhost deste\u011fi<\/p>\n<p>Talebe \u015funlar\u0131 ekleyin: e-posta adresi, hata metninin birebir kopyas\u0131, hatan\u0131n g\u00f6r\u00fcld\u00fc\u011f\u00fc saat, kulland\u0131\u011f\u0131n\u0131z istemci ve genel IP adresiniz, denedi\u011finiz ad\u0131mlar.<\/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\/e-posta-kurulum-ve-sorun-giderme-rehberi\/\" title=\"E-posta Kurulumu, Ayarlar\u0131 ve Hata \u00c7\u00f6z\u00fcmleri Rehberi - Narhost Destek\">E-posta kurulumu ve hata \u00e7\u00f6z\u00fcmleri rehberi<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/smtp-kimlik-dogrulama-sorunlari-relay-hatasi-nasil-duzeltilir\/\" title=\"Relay Access Denied Hatas\u0131 Nas\u0131l D\u00fczeltilir - Narhost Destek\">Relay access denied hatas\u0131<\/a><\/li>\n<li><a href=\"https:\/\/narhost.com\/destek\/smtp-ayarlari-nasil-yapilmali\/\" title=\"SMTP Ayarlar\u0131 Nas\u0131l Yap\u0131lmal\u0131 - Narhost Destek\">SMTP ayarlar\u0131 nas\u0131l yap\u0131lmal\u0131<\/a><\/li>\n<\/ul>\n<\/div>\n<div class=\"kb-faq\">\n<h2>S\u0131k\u00e7a sorulan sorular<\/h2>\n<h3>Gelen posta \u00e7al\u0131\u015f\u0131yor ama g\u00f6nderirken 535 al\u0131yorum, neden?<\/h3>\n<p>Gelen ve giden sunucu ayr\u0131 ayr\u0131 kimlik ister. \u0130stemcinin giden sunucu ayar\u0131nda farkl\u0131 bir kullan\u0131c\u0131 ad\u0131, eski bir parola ya da bo\u015f alan kalm\u0131\u015ft\u0131r; iki b\u00f6l\u00fcm\u00fc ayn\u0131 bilgilerle doldurun.<\/p>\n<h3>cPanel kullan\u0131c\u0131 ad\u0131mla SMTP&#8217;ye ba\u011flanabilir miyim?<\/h3>\n<p>Hay\u0131r. SMTP giri\u015fi e-posta hesab\u0131yla yap\u0131l\u0131r; kullan\u0131c\u0131 ad\u0131 adresin tamam\u0131, parola da o hesab\u0131n parolas\u0131d\u0131r.<\/p>\n<h3>Hata yaln\u0131z WordPress formunda \u00e7\u0131k\u0131yor, ne yapmal\u0131y\u0131m?<\/h3>\n<p>SMTP eklentisindeki kullan\u0131c\u0131 ad\u0131, parola ve port alanlar\u0131n\u0131 bu karttaki tabloya g\u00f6re d\u00fczeltin; eklentinin kendi test g\u00f6nderimi hatay\u0131 ve sunucu yan\u0131t\u0131n\u0131 g\u00f6sterir.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>SMTP 535 hatas\u0131 giden sunucunun kimlik bilgisini reddetti\u011fini g\u00f6sterir: k\u0131sa kullan\u0131c\u0131 ad\u0131, eski parola, giden sunucu i\u00e7in ayr\u0131 kimlik ve port-\u015fifreleme uyumsuzlu\u011fu i\u00e7in cPanel \u00fczerinden ad\u0131m ad\u0131m \u00e7\u00f6z\u00fcm.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-2346","post","type-post","status-publish","format-standard","hentry","category-e-posta"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2346","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=2346"}],"version-history":[{"count":1,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2346\/revisions"}],"predecessor-version":[{"id":2355,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/posts\/2346\/revisions\/2355"}],"wp:attachment":[{"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/media?parent=2346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/categories?post=2346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/narhost.com\/destek\/wp-json\/wp\/v2\/tags?post=2346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}