{"id":3086,"date":"2026-10-27T12:30:00","date_gmt":"2026-10-27T09:30:00","guid":{"rendered":"https:\/\/narhost.com\/blog\/?p=3086"},"modified":"2026-10-15T12:11:02","modified_gmt":"2026-10-15T09:11:02","slug":"smtp-relay-nedir","status":"publish","type":"post","link":"https:\/\/narhost.com\/blog\/smtp-relay-nedir\/","title":{"rendered":"SMTP Relay Nedir, Ne Zaman Gerekir"},"content":{"rendered":"<div id=\"ai-ozet\" class=\"ai-box\">\n<p class=\"ai-box-title\">K\u0131saca \u00f6zet<\/p>\n<ul>\n<li>SMTP relay nedir sorusunun k\u0131sa cevab\u0131: e-postan\u0131n g\u00f6nderildi\u011fi sunucudan do\u011frudan al\u0131c\u0131ya de\u011fil, araya giren bir aktarma sunucusu \u00fczerinden teslim edilmesidir.<\/li>\n<li>Hosting firmalar\u0131 giden postay\u0131 relay sunucular\u0131ndan ge\u00e7irerek sunucular\u0131n g\u00f6nderim itibar\u0131n\u0131 korur ve tek bir hesaptaki sorunun b\u00fct\u00fcn sunucuyu kara listeye ta\u015f\u0131mas\u0131n\u0131 \u00f6nler.<\/li>\n<li>Narhost hosting paketlerinde giden postalar relay sunucular\u0131 \u00fczerinden \u00e7\u0131kar, gelen postalar antispam a\u011f ge\u00e7idinden ge\u00e7er; web ve WordPress paketlerinde hesap ba\u015f\u0131na saatlik 100 e-posta s\u0131n\u0131r\u0131 vard\u0131r.<\/li>\n<li>Kendi sunucunuzdan e-posta g\u00f6nderdi\u011finiz bir VPS&#8217;te harici bir SMTP relay servisi, IP itibar\u0131 ve teslim oran\u0131 sorunlar\u0131n\u0131 \u00e7\u00f6zmenin pratik yoludur.<\/li>\n<li>B\u00fclten ve kampanya gibi toplu g\u00f6nderimler i\u00e7in hosting relay&#8217;i de\u011fil, toplu e-posta i\u00e7in tasarlanm\u0131\u015f ayr\u0131 bir servis kullan\u0131l\u0131r.<\/li>\n<li>Herkesin kullanabildi\u011fi &#8220;a\u00e7\u0131k relay&#8221; bir g\u00fcvenlik hatas\u0131d\u0131r; do\u011fru kurulmu\u015f relay yaln\u0131z kimli\u011fi do\u011frulanm\u0131\u015f kullan\u0131c\u0131lar\u0131n postas\u0131n\u0131 aktar\u0131r.<\/li>\n<\/ul>\n<\/div>\n<p>Hosting paketinin \u00f6zellik listesinde &#8220;Outbound Mail Relay&#8221; sat\u0131r\u0131n\u0131 g\u00f6r\u00fcrs\u00fcn\u00fcz ya da bir e-posta servisinin size &#8220;SMTP relay&#8221; satt\u0131\u011f\u0131n\u0131 duyars\u0131n\u0131z. \u0130ki ifade ayn\u0131 fikre dayan\u0131r ama farkl\u0131 ihtiya\u00e7lara cevap verir. SMTP relay nedir, hosting hesab\u0131n\u0131zda ne i\u015fe yarar ve ne zaman ayr\u0131 bir relay servisine ihtiya\u00e7 duyars\u0131n\u0131z, bu yaz\u0131da karar odakl\u0131 olarak anlat\u0131yoruz.<\/p>\n<h2>SMTP Relay Nedir, Nas\u0131l \u00c7al\u0131\u015f\u0131r<\/h2>\n<p>E-posta, SMTP protokol\u00fcyle sunucudan sunucuya ta\u015f\u0131n\u0131r; protokol\u00fcn kurallar\u0131 <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc5321\" title=\"RFC 5321 \u2014 SMTP protokol\u00fc\" target=\"_blank\" rel=\"noopener\">RFC 5321<\/a>&#8216;de tan\u0131ml\u0131d\u0131r. Bir ileti g\u00f6nderdi\u011finizde e-posta program\u0131n\u0131z onu \u00f6nce kendi sunucunuza teslim eder; sunucu da al\u0131c\u0131n\u0131n posta sunucusuna iletir. Relay d\u00fczeninde araya bir aktarma sunucusu girer: sunucunuz iletiyi al\u0131c\u0131ya de\u011fil relay sunucusuna verir, teslimat\u0131 relay yapar.<\/p>\n<p>Bu yap\u0131n\u0131n amac\u0131 itibar ve denetimdir. Al\u0131c\u0131 sunucular g\u00f6nderen IP adresinin ge\u00e7mi\u015fine bakar; temiz itibarl\u0131, d\u00fczg\u00fcn yap\u0131land\u0131r\u0131lm\u0131\u015f relay sunucular\u0131ndan gelen posta daha kolay kabul edilir. Relay ayr\u0131ca giden postay\u0131 istenmeyen i\u00e7erik a\u00e7\u0131s\u0131ndan s\u00fczebilir ve g\u00f6nderim s\u0131n\u0131rlar\u0131n\u0131 uygular.<\/p>\n<table>\n<thead>\n<tr>\n<th>D\u00fczen<\/th>\n<th>Nas\u0131l \u00e7al\u0131\u015f\u0131r<\/th>\n<th>Kime uygun<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Do\u011frudan g\u00f6nderim<\/td>\n<td>Sunucu iletiyi al\u0131c\u0131n\u0131n sunucusuna kendisi teslim eder<\/td>\n<td>\u0130tibar\u0131 y\u00f6netilen, iyi yap\u0131land\u0131r\u0131lm\u0131\u015f sunucular<\/td>\n<\/tr>\n<tr>\n<td>Hosting relay&#8217;i<\/td>\n<td>Payla\u015f\u0131ml\u0131 sunucunun postas\u0131 firman\u0131n relay sunucular\u0131ndan \u00e7\u0131kar<\/td>\n<td>Kurumsal yaz\u0131\u015fma ve site bildirimleri<\/td>\n<\/tr>\n<tr>\n<td>Harici SMTP relay servisi<\/td>\n<td>Uygulama ya da sunucu postay\u0131 servise kimlik do\u011frulamayla teslim eder<\/td>\n<td>VPS&#8217;ten g\u00f6nderim, uygulama bildirimleri<\/td>\n<\/tr>\n<tr>\n<td>Toplu e-posta servisi<\/td>\n<td>Liste y\u00f6netimi, abonelikten \u00e7\u0131kma ve raporlamayla g\u00f6nderim<\/td>\n<td>B\u00fclten, kampanya, pazarlama<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<div class=\"highlight-box\">\n<p class=\"label\">Bilgi<\/p>\n<p>Narhost \u00fcr\u00fcn sayfalar\u0131na g\u00f6re b\u00fct\u00fcn posta servisleri bir antispam a\u011f ge\u00e7idi \u00fczerinden \u00e7al\u0131\u015f\u0131r, giden posta ise relay sunucular\u0131yla \u00e7\u0131kar. Web ve WordPress hosting paketlerinde g\u00fcnl\u00fck g\u00f6nderim s\u0131n\u0131r\u0131 yoktur; hesap ba\u015f\u0131na saatlik 100 e-posta s\u0131n\u0131r\u0131 uygulan\u0131r.<\/p>\n<\/div>\n<figure class=\"nh-sema\"><img loading=\"lazy\" src=\"https:\/\/narhost.com\/blog\/wp-content\/uploads\/2026\/10\/smtp-relay-nedir-sema-narhost.webp\" alt=\"smtp relay nedir karar \u015femas\u0131 \u2014 hosting relay&#x27;i, harici relay servisi ve toplu e-posta servisi\" width=\"1200\" height=\"500\" loading=\"lazy\" decoding=\"async\"><figcaption>Yaz\u0131\u015fma hosting relay&#x27;inden, uygulama bildirimi relay servisinden, b\u00fclten toplu servisten \u00e7\u0131kar.<\/figcaption><\/figure>\n<h2>Hosting Relay&#8217;i Ne Sa\u011flar<\/h2>\n<p>Payla\u015f\u0131ml\u0131 sunucuda y\u00fczlerce hesap ayn\u0131 IP adresini kullanabilir. Bir hesab\u0131n ele ge\u00e7irilip istenmeyen e-posta g\u00f6ndermesi, do\u011frudan g\u00f6nderim d\u00fczeninde b\u00fct\u00fcn hesaplar\u0131n IP&#8217;sini kara listeye ta\u015f\u0131yabilir. Relay ve saatlik s\u0131n\u0131r bu riski s\u0131n\u0131rlar: sorunlu hesab\u0131n g\u00f6nderimi yava\u015flat\u0131l\u0131r, di\u011fer hesaplar\u0131n postas\u0131 etkilenmez. Kara liste durumunda yap\u0131lacaklar <a href=\"https:\/\/narhost.com\/destek\/mail-sunucu-ipsi-kara-listeden-blacklist-nasil-cikarilir\/\" title=\"Mail Sunucu IP&#039;si Kara Listeden Nas\u0131l \u00c7\u0131kar\u0131l\u0131r \u2014 Narhost Destek Merkezi\">mail sunucu IP&#8217;si kara listeden nas\u0131l \u00e7\u0131kar\u0131l\u0131r<\/a> kart\u0131nda.<\/p>\n<p>Sizin taraf\u0131n\u0131zda yapman\u0131z gereken, alan ad\u0131n\u0131z\u0131n SPF, DKIM ve DMARC kay\u0131tlar\u0131n\u0131 do\u011fru kurmakt\u0131r. Relay itibar\u0131 ne kadar iyi olursa olsun, kimli\u011fi do\u011frulanmayan ileti bug\u00fcn b\u00fcy\u00fck al\u0131c\u0131larda spama d\u00fc\u015fer; kurallar\u0131n \u00f6zeti <a href=\"https:\/\/narhost.com\/blog\/gmail-toplu-gonderici-kurallari\/\" title=\"Gmail ve Yahoo Toplu G\u00f6nderici Kurallar\u0131 \u2014 Narhost Blog\">Gmail toplu g\u00f6nderici kurallar\u0131<\/a> yaz\u0131s\u0131nda.<\/p>\n<div class=\"senaryo-block\">\n<p class=\"label\">\u00d6rnek senaryo<\/p>\n<p>Bir yaz\u0131l\u0131m \u015firketi m\u00fc\u015fteri bildirimlerini kendi VPS&#8217;inden do\u011frudan g\u00f6nderiyordu. Yeni IP adresinin ge\u00e7mi\u015fi olmad\u0131\u011f\u0131 i\u00e7in iletilerin bir k\u0131sm\u0131 Outlook ve Gmail adreslerinde spama d\u00fc\u015ft\u00fc. \u015eirket bildirimleri bir SMTP relay servisi \u00fczerinden, kimlik do\u011frulamal\u0131 olarak 587 numaral\u0131 porttan g\u00f6ndermeye ba\u015flad\u0131 ve servisin SPF ve DKIM kay\u0131tlar\u0131n\u0131 alan ad\u0131na ekledi. Teslim oran\u0131 y\u00fckseldi; sunucunun IP itibar\u0131yla u\u011fra\u015fmak gerekmedi.<\/p>\n<\/div>\n<h2>Ne Zaman Harici SMTP Relay Gerekir<\/h2>\n<p>Payla\u015f\u0131ml\u0131 hostingte kurumsal yaz\u0131\u015fma ve site bildirimleri i\u00e7in hosting relay&#8217;i yeterlidir. Harici bir relay servisi \u015fu durumlarda mant\u0131kl\u0131d\u0131r: kendi VPS ya da VDS&#8217;inizden uygulama bildirimi g\u00f6nderiyorsan\u0131z, sunucunuzun IP adresi yeni ya da itibar\u0131 zay\u0131fsa, g\u00f6nderim hacminiz saatlik s\u0131n\u0131r\u0131 d\u00fczenli olarak a\u015f\u0131yorsa ve teslim raporlar\u0131na ihtiya\u00e7 duyuyorsan\u0131z. Kendi posta sunucusunu kurman\u0131n y\u00fck\u00fc <a href=\"https:\/\/narhost.com\/blog\/kendi-mail-sunucusu-kurmak\/\" title=\"Kendi Mail Sunucusu Kurmak \u2014 Narhost Blog\">kendi mail sunucusu kurmak<\/a> yaz\u0131s\u0131nda anlat\u0131ld\u0131.<\/p>\n<p>B\u00fclten ve kampanya ise ayr\u0131 bir konudur. Toplu g\u00f6nderim i\u00e7in liste y\u00f6netimi, abonelikten \u00e7\u0131kma ve \u015fik\u00e2yet takibi sunan servisler kullan\u0131l\u0131r; se\u00e7enekler <a href=\"https:\/\/narhost.com\/blog\/toplu-mail-gonderme-hosting\/\" title=\"Toplu Mail G\u00f6nderme Hosting \u00dczerinden Yap\u0131l\u0131r m\u0131 \u2014 Narhost Blog\">toplu mail g\u00f6nderme hosting \u00fczerinden yap\u0131l\u0131r m\u0131<\/a> yaz\u0131s\u0131nda kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131.<\/p>\n<div class=\"warn-box\">\n<p class=\"label\">Dikkat<\/p>\n<p>Kendi sunucunuzda posta yaz\u0131l\u0131m\u0131 kuruyorsan\u0131z, kimli\u011fi do\u011frulanmam\u0131\u015f herkesin postas\u0131n\u0131 aktaran &#8220;a\u00e7\u0131k relay&#8221; yap\u0131land\u0131rmas\u0131ndan ka\u00e7\u0131n\u0131n. A\u00e7\u0131k relay k\u0131sa s\u00fcrede istenmeyen e-posta g\u00f6nderenler taraf\u0131ndan bulunur ve sunucunuzun IP adresi kara listeye girer.<\/p>\n<\/div>\n<h2>Hangi Port Kullan\u0131l\u0131r<\/h2>\n<p>\u0130stemciden ya da uygulamadan relay&#8217;e posta teslimi i\u00e7in 587 numaral\u0131 port (STARTTLS) ve 465 numaral\u0131 port (do\u011frudan TLS) kullan\u0131l\u0131r; teslim portunun kurallar\u0131 <a href=\"https:\/\/www.rfc-editor.org\/rfc\/rfc6409\" title=\"RFC 6409 \u2014 e-posta teslim (submission) portu\" target=\"_blank\" rel=\"noopener\">RFC 6409<\/a>&#8216;da tan\u0131ml\u0131d\u0131r. 25 numaral\u0131 port sunucular aras\u0131 aktar\u0131m i\u00e7indir ve bir\u00e7ok a\u011fda istemci g\u00f6nderimine kapal\u0131d\u0131r. Narhost&#8217;ta e-posta programlar\u0131 i\u00e7in giden sunucu ayarlar\u0131 SMTP 465 ve 587&#8217;dir; ayr\u0131nt\u0131lar <a href=\"https:\/\/narhost.com\/destek\/smtp-ayarlari-nasil-yapilmali\/\" title=\"SMTP Ayarlar\u0131 Nas\u0131l Yap\u0131lmal\u0131 \u2014 Narhost Destek Merkezi\">SMTP ayarlar\u0131 nas\u0131l yap\u0131lmal\u0131<\/a> kart\u0131nda.<\/p>\n<div class=\"success-box\">\n<p class=\"label\">Sonu\u00e7<\/p>\n<p>SMTP relay nedir sorusunun pratik kar\u015f\u0131l\u0131\u011f\u0131, postan\u0131n itibar\u0131 y\u00f6netilen bir aktarma sunucusundan \u00e7\u0131kmas\u0131d\u0131r. Hosting paketlerinde bu zaten yap\u0131l\u0131r; size d\u00fc\u015fen SPF, DKIM ve DMARC kay\u0131tlar\u0131n\u0131 kurmakt\u0131r. Kendi sunucunuzdan uygulama bildirimi g\u00f6nderiyorsan\u0131z harici bir relay servisi, b\u00fclten g\u00f6nderiyorsan\u0131z toplu e-posta servisi do\u011fru se\u00e7imdir.<\/p>\n<\/div>\n<h2>Kontrol Listesi<\/h2>\n<ul class=\"kontrol-listesi\">\n<li>Alan ad\u0131n\u0131zdan e-posta g\u00f6nderen b\u00fct\u00fcn sistemleri listeleyin.<\/li>\n<li>Her sistem i\u00e7in hangi sunucudan ya da servisten g\u00f6nderdi\u011fini belirleyin.<\/li>\n<li>SPF kayd\u0131n\u0131n bu kaynaklar\u0131n hepsini i\u00e7erdi\u011fini do\u011frulay\u0131n.<\/li>\n<li>DKIM imzas\u0131n\u0131 a\u00e7\u0131n ve DMARC kayd\u0131 yay\u0131mlay\u0131n.<\/li>\n<li>Saatlik g\u00f6nderim s\u0131n\u0131r\u0131n\u0131 a\u015fan bir i\u015f varsa ayr\u0131 servise ta\u015f\u0131y\u0131n.<\/li>\n<li>Uygulamalarda 587 ya da 465 portunu ve kimlik do\u011frulamay\u0131 kullan\u0131n.<\/li>\n<li>Kendi posta sunucunuzda a\u00e7\u0131k relay olmad\u0131\u011f\u0131n\u0131 test edin.<\/li>\n<\/ul>\n<div class=\"kb-faq\">\n<h2>S\u0131k\u00e7a sorulan sorular<\/h2>\n<h3>SMTP relay nedir, SMTP sunucusundan fark\u0131 ne?<\/h3>\n<p>Her relay bir SMTP sunucusudur, ama her SMTP sunucusu relay de\u011fildir. Relay, kendisine ait olmayan postay\u0131 ba\u015fka bir sunucuya aktarmak i\u00e7in kullan\u0131lan sunucudur. Hosting firmalar\u0131n\u0131n giden posta sunucular\u0131 bu g\u00f6revi g\u00f6r\u00fcr.<\/p>\n<h3>Hosting e-postam\u0131 relay sunucusu olmadan g\u00f6nderebilir miyim?<\/h3>\n<p>Payla\u015f\u0131ml\u0131 hostingte giden posta d\u00fczeni sunucu genelinde y\u00f6netilir ve m\u00fc\u015fteri taraf\u0131ndan de\u011fi\u015ftirilemez. Bu d\u00fczen hesaplar\u0131n birbirinin itibar\u0131n\u0131 etkilemesini \u00f6nlemek i\u00e7in kurulmu\u015ftur.<\/p>\n<h3>Saatlik 100 e-posta s\u0131n\u0131r\u0131 neyi kapsar?<\/h3>\n<p>Hesaptaki b\u00fct\u00fcn g\u00f6nderimleri: e-posta program\u0131ndan giden iletiler, web sitesi formlar\u0131 ve WordPress bildirimleri. G\u00fcnl\u00fck bir s\u0131n\u0131r yoktur; yo\u011fun saatlerde fazlas\u0131 s\u0131raya girer.<\/p>\n<h3>WordPress sitem i\u00e7in ayr\u0131 bir SMTP relay gerekir mi?<\/h3>\n<p>\u00c7o\u011fu sitede gerekmez; sitenin bildirimlerini hosting hesab\u0131ndaki bir e-posta adresinden kimlik do\u011frulamal\u0131 SMTP ile g\u00f6ndermek yeterlidir. Y\u00fcksek hacimli e-ticaret sitelerinde ya da saatlik s\u0131n\u0131r\u0131n d\u00fczenli a\u015f\u0131ld\u0131\u011f\u0131 durumlarda ayr\u0131 bir servis d\u00fc\u015f\u00fcn\u00fclebilir.<\/p>\n<h3>A\u00e7\u0131k relay olup olmad\u0131\u011f\u0131n\u0131 nas\u0131l anlar\u0131m?<\/h3>\n<p>Kendi kurdu\u011funuz bir posta sunucusunda, kimlik do\u011frulamas\u0131 yapmadan d\u0131\u015far\u0131dan ba\u015fka bir alan ad\u0131na ileti g\u00f6ndermeyi deneyin. Sunucu bu iletiyi kabul ediyorsa a\u00e7\u0131k relay&#8217;dir ve hemen kapat\u0131lmal\u0131d\u0131r.<\/p>\n<\/div>\n<div class=\"cta-box\">\n<p class=\"label\">Narhost&#8217;ta<\/p>\n<p>Web hosting paketlerimizde e-postan\u0131n gelen trafi\u011fi antispam a\u011f ge\u00e7idinden ge\u00e7er, giden postas\u0131 relay sunucular\u0131yla \u00e7\u0131kar; g\u00fcnl\u00fck g\u00f6nderim s\u0131n\u0131r\u0131 yoktur.<\/p>\n<p><a class=\"cta-btn\" href=\"https:\/\/narhost.com\/web-hosting\" title=\"Narhost Web Hosting paketleri\">Web hosting paketlerini incele<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>SMTP relay nedir sorusunun k\u0131sa cevab\u0131: e-postan\u0131n do\u011frudan al\u0131c\u0131ya de\u011fil, araya giren bir aktarma sunucusu \u00fczerinden teslim edilmesidir. Hosting relay&#8217;i, VPS i\u00e7in harici relay servisi, toplu e-posta servisi ve a\u00e7\u0131k relay riski.<\/p>\n","protected":false},"author":1,"featured_media":3087,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-3086","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-e-posta"],"_links":{"self":[{"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/posts\/3086","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/comments?post=3086"}],"version-history":[{"count":1,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/posts\/3086\/revisions"}],"predecessor-version":[{"id":3088,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/posts\/3086\/revisions\/3088"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/media\/3087"}],"wp:attachment":[{"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/media?parent=3086"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/categories?post=3086"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/narhost.com\/blog\/wp-json\/wp\/v2\/tags?post=3086"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}