{"id":3002,"date":"2025-12-06T16:48:40","date_gmt":"2025-12-06T13:48:40","guid":{"rendered":"https:\/\/www.dchost.com\/blog\/kendi-alan-adinizla-kurumsal-e-posta-kurma-rehberi\/"},"modified":"2025-12-06T16:48:40","modified_gmt":"2025-12-06T13:48:40","slug":"kendi-alan-adinizla-kurumsal-e-posta-kurma-rehberi","status":"publish","type":"post","link":"https:\/\/www.dchost.com\/blog\/kendi-alan-adinizla-kurumsal-e-posta-kurma-rehberi\/","title":{"rendered":"Kendi Alan Ad\u0131n\u0131zla Kurumsal E\u2011Posta Kurma Rehberi"},"content":{"rendered":"<div class=\"dchost-blog-content-wrapper\"><div id=\"toc_container\" class=\"toc_transparent no_bullets\"><p class=\"toc_title\">\u0130&ccedil;indekiler<\/p><ul class=\"toc_list\"><li><a href=\"#Kendi_alan_adinizla_kurumsal_eposta_kullanmanin_isinize_etkisi\"><span class=\"toc_number toc_depth_1\">1<\/span> Kendi alan ad\u0131n\u0131zla kurumsal e\u2011posta kullanman\u0131n i\u015finize etkisi<\/a><\/li><li><a href=\"#Altyapiyi_planlamak_Domain_hosting_ve_DNS_tarafi\"><span class=\"toc_number toc_depth_1\">2<\/span> Altyap\u0131y\u0131 planlamak: Domain, hosting ve DNS taraf\u0131<\/a><ul><li><a href=\"#Hangi_altyapiyi_kullanmaliyim\"><span class=\"toc_number toc_depth_2\">2.1<\/span> Hangi altyap\u0131y\u0131 kullanmal\u0131y\u0131m?<\/a><\/li><li><a href=\"#DNS_temel_kavramlar_MX_A_ve_TXT_kayitlari\"><span class=\"toc_number toc_depth_2\">2.2<\/span> DNS temel kavramlar: MX, A ve TXT kay\u0131tlar\u0131<\/a><\/li><\/ul><\/li><li><a href=\"#MX_kayitlariyla_epostayi_dogru_sunucuya_yonlendirmek\"><span class=\"toc_number toc_depth_1\">3<\/span> MX kay\u0131tlar\u0131yla e\u2011postay\u0131 do\u011fru sunucuya y\u00f6nlendirmek<\/a><ul><li><a href=\"#Temel_MX_senaryosu\"><span class=\"toc_number toc_depth_2\">3.1<\/span> Temel MX senaryosu<\/a><\/li><li><a href=\"#DCHost_panelinde_MX_kaydi_ekleme_adimlari_genel_mantik\"><span class=\"toc_number toc_depth_2\">3.2<\/span> DCHost panelinde MX kayd\u0131 ekleme ad\u0131mlar\u0131 (genel mant\u0131k)<\/a><\/li><\/ul><\/li><li><a href=\"#SPF_Alan_adiniz_adina_kimlerin_eposta_gonderebilecegini_tanimlamak\"><span class=\"toc_number toc_depth_1\">4<\/span> SPF: Alan ad\u0131n\u0131z ad\u0131na kimlerin e\u2011posta g\u00f6nderebilece\u011fini tan\u0131mlamak<\/a><ul><li><a href=\"#Basit_bir_SPF_kaydi_ornegi\"><span class=\"toc_number toc_depth_2\">4.1<\/span> Basit bir SPF kayd\u0131 \u00f6rne\u011fi<\/a><\/li><li><a href=\"#SPF_tarafinda_sik_yapilan_hatalar\"><span class=\"toc_number toc_depth_2\">4.2<\/span> SPF taraf\u0131nda s\u0131k yap\u0131lan hatalar<\/a><\/li><\/ul><\/li><li><a href=\"#DKIM_Eposta_icerigini_kriptografik_olarak_imzalamak\"><span class=\"toc_number toc_depth_1\">5<\/span> DKIM: E\u2011posta i\u00e7eri\u011fini kriptografik olarak imzalamak<\/a><ul><li><a href=\"#DKIM_nasil_calisir_ozet\"><span class=\"toc_number toc_depth_2\">5.1<\/span> DKIM nas\u0131l \u00e7al\u0131\u015f\u0131r (\u00f6zet)<\/a><\/li><li><a href=\"#DKIM_DNS_kaydinin_tipik_formu\"><span class=\"toc_number toc_depth_2\">5.2<\/span> DKIM DNS kayd\u0131n\u0131n tipik formu<\/a><\/li><\/ul><\/li><li><a href=\"#DMARC_ve_rDNS_ile_eposta_itibarini_guclendirmek\"><span class=\"toc_number toc_depth_1\">6<\/span> DMARC ve rDNS ile e\u2011posta itibar\u0131n\u0131 g\u00fc\u00e7lendirmek<\/a><ul><li><a href=\"#Basit_bir_DMARC_kaydi_ornegi\"><span class=\"toc_number toc_depth_2\">6.1<\/span> Basit bir DMARC kayd\u0131 \u00f6rne\u011fi<\/a><\/li><li><a href=\"#rDNS_PTR_kaydi_ve_IP_itibarinin_onemi\"><span class=\"toc_number toc_depth_2\">6.2<\/span> rDNS (PTR) kayd\u0131 ve IP itibar\u0131n\u0131n \u00f6nemi<\/a><\/li><\/ul><\/li><li><a href=\"#Webmail_Tarayicidan_hizli_erisim_ve_pratik_kullanim\"><span class=\"toc_number toc_depth_1\">7<\/span> Webmail: Taray\u0131c\u0131dan h\u0131zl\u0131 eri\u015fim ve pratik kullan\u0131m<\/a><ul><li><a href=\"#Webmail_adresi_ve_giris\"><span class=\"toc_number toc_depth_2\">7.1<\/span> Webmail adresi ve giri\u015f<\/a><\/li><li><a href=\"#Webmail_ne_zaman_yeter_ne_zaman_istemci_gerekir\"><span class=\"toc_number toc_depth_2\">7.2<\/span> Webmail ne zaman yeter, ne zaman istemci gerekir?<\/a><\/li><\/ul><\/li><li><a href=\"#Outlook_Thunderbird_ve_mobil_cihazlarda_istemci_ayarlari\"><span class=\"toc_number toc_depth_1\">8<\/span> Outlook, Thunderbird ve mobil cihazlarda istemci ayarlar\u0131<\/a><ul><li><a href=\"#IMAP_mi_POP3_mu\"><span class=\"toc_number toc_depth_2\">8.1<\/span> IMAP mi, POP3 m\u00fc?<\/a><\/li><li><a href=\"#Genel_gelen_mail_IMAPPOP3_ayarlari\"><span class=\"toc_number toc_depth_2\">8.2<\/span> Genel gelen mail (IMAP\/POP3) ayarlar\u0131<\/a><\/li><li><a href=\"#Giden_mail_SMTP_ayarlari\"><span class=\"toc_number toc_depth_2\">8.3<\/span> Giden mail (SMTP) ayarlar\u0131<\/a><\/li><li><a href=\"#Mobil_cihazlarda_iOS_Android_kurulum_ipuclari\"><span class=\"toc_number toc_depth_2\">8.4<\/span> Mobil cihazlarda (iOS \/ Android) kurulum ipu\u00e7lar\u0131<\/a><\/li><\/ul><\/li><li><a href=\"#Test_izleme_ve_yayina_alma_kontrol_listesi\"><span class=\"toc_number toc_depth_1\">9<\/span> Test, izleme ve yay\u0131na alma kontrol listesi<\/a><\/li><li><a href=\"#Sik_yapilan_hatalar_ve_gercek_senaryolar\"><span class=\"toc_number toc_depth_1\">10<\/span> S\u0131k yap\u0131lan hatalar ve ger\u00e7ek senaryolar<\/a><ul><li><a href=\"#Alan_adi_tasirken_MX_kayitlarini_unutmak\"><span class=\"toc_number toc_depth_2\">10.1<\/span> Alan ad\u0131 ta\u015f\u0131rken MX kay\u0131tlar\u0131n\u0131 unutmak<\/a><\/li><li><a href=\"#Fazla_agresif_SPFDMARC_politikalari\"><span class=\"toc_number toc_depth_2\">10.2<\/span> Fazla agresif SPF\/DMARC politikalar\u0131<\/a><\/li><li><a href=\"#POP3_kullanip_8220mailler_kayboldu8221_panigi\"><span class=\"toc_number toc_depth_2\">10.3<\/span> POP3 kullan\u0131p &#8220;mailler kayboldu&#8221; pani\u011fi<\/a><\/li><li><a href=\"#IP_veya_itibar_sorunlari\"><span class=\"toc_number toc_depth_2\">10.4<\/span> IP veya itibar sorunlar\u0131<\/a><\/li><\/ul><\/li><li><a href=\"#DCHost_ile_saglam_bir_kurumsal_eposta_altyapisi_kurmak\"><span class=\"toc_number toc_depth_1\">11<\/span> DCHost ile sa\u011flam bir kurumsal e\u2011posta altyap\u0131s\u0131 kurmak<\/a><\/li><\/ul><\/div>\n<h2><span id=\"Kendi_alan_adinizla_kurumsal_eposta_kullanmanin_isinize_etkisi\">Kendi alan ad\u0131n\u0131zla kurumsal e\u2011posta kullanman\u0131n i\u015finize etkisi<\/span><\/h2>\n<p>Teklif mailinizi &#8220;isim.soyisim@gmail.com&#8221; yerine &#8220;isim@markaniz.com&#8221; adresinden g\u00f6ndermek, kar\u015f\u0131 taraf\u0131n g\u00f6z\u00fcnde sizi bir anda farkl\u0131 bir kategoriye koyar. Kurumsal e\u2011posta yaln\u0131zca daha profesyonel g\u00f6r\u00fcnmek i\u00e7in de\u011fil; teslim edilebilirlik, g\u00fcvenlik, yedekleme ve y\u00f6netilebilirlik i\u00e7in de kritik bir altyap\u0131 par\u00e7as\u0131d\u0131r. \u00d6zellikle b\u00fcy\u00fcyen i\u015fletmelerde, &#8220;e-postalar bazen gelmiyor&#8221;, &#8220;m\u00fc\u015fteri maili spam&#8217;e d\u00fc\u015ft\u00fc&#8221; gibi c\u00fcmleler, do\u011frudan gelir ve itibar kayb\u0131na d\u00f6n\u00fc\u015f\u00fcr.<\/p>\n<p>Biz DCHost taraf\u0131nda sahada en \u00e7ok \u015funu g\u00f6r\u00fcyoruz: Web sitesi kurulmu\u015f, alan ad\u0131 al\u0131nm\u0131\u015f, basit bir hosting paketi var; ama e\u2011posta taraf\u0131 ya ki\u015fisel hesaplara y\u00f6nlendirilmi\u015f ya da DNS kay\u0131tlar\u0131 eksik oldu\u011fu i\u00e7in mailler d\u00fczensiz \u00e7al\u0131\u015f\u0131yor. Oysa do\u011fru planlanm\u0131\u015f bir MX, SPF, DKIM ve DMARC yap\u0131s\u0131yla, \u00fczerine de d\u00fczg\u00fcn webmail ve istemci (Outlook, mobil vs.) ayarlar\u0131 eklendi\u011finde, y\u0131llarca sorunsuz \u00e7al\u0131\u015facak bir kurumsal e\u2011posta altyap\u0131s\u0131 kurmak m\u00fcmk\u00fcn.<\/p>\n<p>Bu rehberde, kendi alan ad\u0131n\u0131zla kurumsal e\u2011posta kurarken bilmeniz gereken her ad\u0131m\u0131; MX kay\u0131tlar\u0131ndan SPF ve DKIM&#8217;e, webmail aray\u00fcz\u00fcnden Outlook\/telefon ayarlar\u0131na kadar, DCHost altyap\u0131s\u0131 \u00f6rnekleri \u00fczerinden sade ve uygulanabilir \u015fekilde anlataca\u011f\u0131z.<\/p>\n<h2><span id=\"Altyapiyi_planlamak_Domain_hosting_ve_DNS_tarafi\">Altyap\u0131y\u0131 planlamak: Domain, hosting ve DNS taraf\u0131<\/span><\/h2>\n<p>Kurumsal e\u2011posta adreslerinizin sorunsuz \u00e7al\u0131\u015fmas\u0131 i\u00e7in \u00f6nce temeli do\u011fru kurman\u0131z gerekiyor. Bu temel \u00fc\u00e7 par\u00e7adan olu\u015fuyor:<\/p>\n<ul>\n<li><strong>Alan ad\u0131 (domain):<\/strong> ornekfirma.com gibi, markan\u0131z\u0131 temsil eden adres.<\/li>\n<li><strong>Hosting veya e\u2011posta sunucusu:<\/strong> E\u2011postalar\u0131n ger\u00e7ekten sakland\u0131\u011f\u0131 ve i\u015flendi\u011fi DCHost sunucusu.<\/li>\n<li><strong>DNS kay\u0131tlar\u0131:<\/strong> &#8220;Bu alan ad\u0131 i\u00e7in e\u2011postalar \u015fu sunucuya gitsin&#8221; diyen y\u00f6nlendirme kurallar\u0131.<\/li>\n<\/ul>\n<p>Alan ad\u0131 taraf\u0131na hen\u00fcz h\u00e2kim de\u011filseniz, \u00f6nce <a href=\"https:\/\/www.dchost.com\/blog\/domain-ve-hosting-arasindaki-fark-nedir\/\">domain ve hosting aras\u0131ndaki fark\u0131 anlatt\u0131\u011f\u0131m\u0131z rehbere<\/a> g\u00f6z atman\u0131z faydal\u0131 olabilir. Yeni bir domain ald\u0131ysan\u0131z ve hen\u00fcz nameserver\/DNS y\u00f6nlendirmelerini yapmad\u0131ysan\u0131z da, ad\u0131m ad\u0131m ekran g\u00f6r\u00fcnt\u00fcleriyle anlatt\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.dchost.com\/blog\/yeni-aldiginiz-alan-adini-hosting-hesabina-baglamak-adim-adim-nameserver-dns-ve-ssl-rehberi\/\">&#8220;alan ad\u0131n\u0131 hosting hesab\u0131na ba\u011flama&#8221; rehberini<\/a> takip edebilirsiniz.<\/p>\n<h3><span id=\"Hangi_altyapiyi_kullanmaliyim\">Hangi altyap\u0131y\u0131 kullanmal\u0131y\u0131m?<\/span><\/h3>\n<p>DCHost taraf\u0131nda kurumsal e\u2011posta ihtiya\u00e7lar\u0131n\u0131 genelde \u00fc\u00e7 \u015fekilde \u00e7\u00f6z\u00fcyoruz:<\/p>\n<ul>\n<li><strong>Payla\u015f\u0131ml\u0131 hosting \u00fczerinde e\u2011posta:<\/strong> K\u00fc\u00e7\u00fck i\u015fletmeler, ajanslar ve KOB\u0130&#8217;ler i\u00e7in \u00e7o\u011fu zaman yeterli. Web siteniz ve e\u2011postalar\u0131n\u0131z ayn\u0131 hosting hesab\u0131nda tutulur.<\/li>\n<li><strong>VPS \u00fczerinde \u00f6zel e\u2011posta sunucusu:<\/strong> Y\u00fcksek hacimli e\u2011posta trafi\u011fi, \u00f6zel g\u00fcvenlik kurallar\u0131 veya mevzuat gereksinimleri (KVKK gibi) olan i\u015fletmeler i\u00e7in daha esnek ve \u00f6l\u00e7eklenebilir bir \u00e7\u00f6z\u00fcm.<\/li>\n<li><strong>Dedicated sunucu veya colocation:<\/strong> Tamamen size ayr\u0131lm\u0131\u015f donan\u0131m, \u00f6zel g\u00fcvenlik ve yo\u011fun e\u2011posta trafi\u011fi gerektiren b\u00fcy\u00fck yap\u0131larda tercih edilir.<\/li>\n<\/ul>\n<p>\u0130\u015fletmeniz b\u00fcy\u00fcd\u00fck\u00e7e, payla\u015f\u0131ml\u0131 hosting&#8217;den VPS&#8217;e ge\u00e7meniz gerekebilir. Bunu da ayr\u0131 bir yaz\u0131da detayl\u0131 anlatt\u0131k: <a href=\"https:\/\/www.dchost.com\/blog\/paylasimli-hostingden-vpse-sorunsuz-gecis-rehberi\/\">payla\u015f\u0131ml\u0131 hosting\u2019den VPS\u2019e sorunsuz ge\u00e7i\u015f rehberi<\/a>.<\/p>\n<h3><span id=\"DNS_temel_kavramlar_MX_A_ve_TXT_kayitlari\">DNS temel kavramlar: MX, A ve TXT kay\u0131tlar\u0131<\/span><\/h3>\n<p>Kurumsal e\u2011posta altyap\u0131s\u0131nda en \u00e7ok kullanaca\u011f\u0131m\u0131z DNS kay\u0131tlar\u0131 \u015funlar:<\/p>\n<ul>\n<li><strong>MX (Mail Exchanger):<\/strong> Alan ad\u0131n\u0131z i\u00e7in gelen e\u2011postalar\u0131 hangi sunucunun kabul edece\u011fini s\u00f6yler.<\/li>\n<li><strong>A kayd\u0131:<\/strong> mail.ornekfirma.com gibi bir alt alan ad\u0131n\u0131, belirli bir IP adresine y\u00f6nlendirir.<\/li>\n<li><strong>TXT kayd\u0131:<\/strong> SPF, DKIM, DMARC gibi do\u011frulama ve g\u00fcvenlik politikalar\u0131n\u0131 tan\u0131mlamak i\u00e7in kullan\u0131l\u0131r.<\/li>\n<\/ul>\n<p>DNS kay\u0131tlar\u0131n\u0131n mant\u0131\u011f\u0131n\u0131 ve di\u011fer kay\u0131t t\u00fcrlerini (CNAME, SRV, CAA vb.) de anlamak isterseniz, detayl\u0131 anlatt\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.dchost.com\/blog\/dns-kayitlari-nedir-a-aaaa-cname-mx-txt-ve-srv-rehberi\/\">DNS kay\u0131tlar\u0131 rehberimize<\/a> mutlaka g\u00f6z at\u0131n. \u015eimdi ad\u0131m ad\u0131m MX ile ba\u015flayal\u0131m.<\/p>\n<h2><span id=\"MX_kayitlariyla_epostayi_dogru_sunucuya_yonlendirmek\">MX kay\u0131tlar\u0131yla e\u2011postay\u0131 do\u011fru sunucuya y\u00f6nlendirmek<\/span><\/h2>\n<p>MX kayd\u0131, &#8220;@ornekfirma.com alan\u0131na gelen t\u00fcm mailleri hangi sunucu kar\u015f\u0131las\u0131n?&#8221; sorusunun cevab\u0131n\u0131 DNS seviyesinde verir. E\u011fer MX kayd\u0131n\u0131z yanl\u0131\u015fsa ya da eksikse, mailleriniz ya hi\u00e7 gelmez ya da rastgele gecikmeler ve bounce (geri d\u00f6n\u00fc\u015f) hatalar\u0131yla u\u011fra\u015f\u0131rs\u0131n\u0131z.<\/p>\n<h3><span id=\"Temel_MX_senaryosu\">Temel MX senaryosu<\/span><\/h3>\n<p>Basit ve yayg\u0131n bir kurulum \u015f\u00f6yle g\u00f6r\u00fcn\u00fcr:<\/p>\n<ul>\n<li><strong>Alan ad\u0131:<\/strong> ornekfirma.com<\/li>\n<li><strong>E\u2011posta sunucusu host ad\u0131:<\/strong> mail.ornekfirma.com<\/li>\n<li><strong>mail.ornekfirma.com i\u00e7in A kayd\u0131:<\/strong> 203.0.113.10 (DCHost \u00fczerindeki sunucunuzun IP adresi)<\/li>\n<li><strong>ornekfirma.com i\u00e7in MX kayd\u0131:<\/strong> \u00d6ncelik 10, hedef mail.ornekfirma.com<\/li>\n<\/ul>\n<p>Burada kritik nokta \u015fu: MX hedefi <strong>her zaman bir host ad\u0131 olmal\u0131<\/strong> (mail.ornekfirma.com gibi), do\u011frudan IP adresi yaz\u0131lmaz. Bu host ad\u0131n\u0131n da mutlaka do\u011fru bir A kayd\u0131 ile sunucunuzun IP&#8217;sine i\u015faret etmesi gerekir.<\/p>\n<h3><span id=\"DCHost_panelinde_MX_kaydi_ekleme_adimlari_genel_mantik\">DCHost panelinde MX kayd\u0131 ekleme ad\u0131mlar\u0131 (genel mant\u0131k)<\/span><\/h3>\n<ol>\n<li>DCHost m\u00fc\u015fteri panelinize veya kulland\u0131\u011f\u0131n\u0131z kontrol paneline (cPanel, DirectAdmin vb.) giri\u015f yap\u0131n.<\/li>\n<li>Alan ad\u0131n\u0131z\u0131n DNS y\u00f6netim ekran\u0131na girin.<\/li>\n<li>\u00d6nce <strong>mail.alanadiniz.com<\/strong> i\u00e7in bir A kayd\u0131 ekleyin ve sunucunuzun IP adresini yaz\u0131n.<\/li>\n<li>Ard\u0131ndan yeni bir MX kayd\u0131 ekleyin:\n<ul>\n<li>Host \/ Name: @ (veya bo\u015f, panele g\u00f6re de\u011fi\u015fir)<\/li>\n<li>Priority (\u00f6ncelik): 10<\/li>\n<li>Value \/ Hedef: mail.alanadiniz.com<\/li>\n<li>TTL: 3600 (veya 1 saat, varsay\u0131lan genelde yeterli)<\/li>\n<\/ul>\n<\/li>\n<li>Kaydedip \u00e7\u0131kt\u0131\u011f\u0131n\u0131zda, DNS yay\u0131l\u0131m\u0131 i\u00e7in 0\u20134 saat aras\u0131 bir s\u00fcre tan\u0131y\u0131n.<\/li>\n<\/ol>\n<p>E\u011fer yedekli bir e\u2011posta altyap\u0131s\u0131 kurmak istiyorsan\u0131z, birden fazla MX kayd\u0131yla <strong>backup MX<\/strong> senaryolar\u0131 da m\u00fcmk\u00fcnd\u00fcr. Bunu da ayr\u0131 bir rehberde detayland\u0131rd\u0131k: <a href=\"https:\/\/www.dchost.com\/blog\/e-posta-altyapisinda-yedeklilik-birden-fazla-mx-kaydi-backup-mx-ve-split-delivery-kurulumu\/\">birden fazla MX kayd\u0131 ve backup MX kurulumu<\/a>.<\/p>\n<h2><span id=\"SPF_Alan_adiniz_adina_kimlerin_eposta_gonderebilecegini_tanimlamak\">SPF: Alan ad\u0131n\u0131z ad\u0131na kimlerin e\u2011posta g\u00f6nderebilece\u011fini tan\u0131mlamak<\/span><\/h2>\n<p>MX kay\u0131tlar\u0131, gelen e\u2011postay\u0131 do\u011fru sunucuya y\u00f6nlendirir. SPF (Sender Policy Framework) ise, &#8220;Bu alan ad\u0131 ad\u0131na e\u2011posta g\u00f6ndermeye yetkili sunucular hangileri?&#8221; sorusuna cevap verir. Al\u0131c\u0131 sunucular, SPF kayd\u0131n\u0131z\u0131 kontrol ederek sizden geldi\u011fini iddia eden maillerin ger\u00e7ekten sizin yetkili IP&#8217;lerinizden gelip gelmedi\u011fini do\u011frular.<\/p>\n<h3><span id=\"Basit_bir_SPF_kaydi_ornegi\">Basit bir SPF kayd\u0131 \u00f6rne\u011fi<\/span><\/h3>\n<p>Payla\u015f\u0131ml\u0131 hosting kullanan ve sadece DCHost \u00fczerindeki sunucusundan mail g\u00f6nderen bir i\u015fletme i\u00e7in tipik SPF kayd\u0131 \u015f\u00f6yle olabilir:<\/p>\n<p><code>v=spf1 a mx ~all<\/code><\/p>\n<p>Bu kayd\u0131n anlam\u0131 kabaca \u015fudur:<\/p>\n<ul>\n<li><strong>v=spf1:<\/strong> SPF s\u00fcr\u00fcm\u00fc.<\/li>\n<li><strong>a:<\/strong> Alan ad\u0131n\u0131z\u0131n A kayd\u0131ndaki IP, mail g\u00f6ndermeye yetkilidir.<\/li>\n<li><strong>mx:<\/strong> MX kay\u0131tlar\u0131n\u0131zda tan\u0131ml\u0131 sunucular mail g\u00f6nderebilir.<\/li>\n<li><strong>~all:<\/strong> Di\u011fer t\u00fcm IP&#8217;ler i\u00e7in &#8220;yumu\u015fak&#8221; (softfail) politika; yani \u015f\u00fcpheli ama tamamen reddetme.<\/li>\n<\/ul>\n<p>SPF kayd\u0131n\u0131z\u0131 alan ad\u0131n\u0131z i\u00e7in bir <strong>TXT kayd\u0131<\/strong> olarak ekliyorsunuz. \u00d6rnek:<\/p>\n<ul>\n<li>Host \/ Name: @<\/li>\n<li>Tip: TXT<\/li>\n<li>De\u011fer: <code>v=spf1 a mx ~all<\/code><\/li>\n<\/ul>\n<p>\u00c7oklu servis (\u00f6rne\u011fin hem DCHost sunucusu hem de \u00fc\u00e7\u00fcnc\u00fc taraf bir pazarlama arac\u0131) kullan\u0131yorsan\u0131z, o servislerin verdi\u011fi <code>include:<\/code> ifadelerini de SPF kayd\u0131n\u0131za eklemeniz gerekir. SPF, DMARC ve DKIM i\u015fini derinlemesine anlatt\u0131\u011f\u0131m\u0131z ayr\u0131 bir yaz\u0131m\u0131z var: <a href=\"https:\/\/www.dchost.com\/blog\/spf-dkim-ve-dmarc-nedir-ozel-alan-adi-ile-e-posta-dogrulamasini-cpanel-ve-vpste-sifirdan-kurmak\/\">SPF, DKIM ve DMARC nedir ve nas\u0131l kurulur<\/a> rehberini mutlaka okuyun.<\/p>\n<h3><span id=\"SPF_tarafinda_sik_yapilan_hatalar\">SPF taraf\u0131nda s\u0131k yap\u0131lan hatalar<\/span><\/h3>\n<ul>\n<li>Birden fazla SPF TXT kayd\u0131 eklemek (yaln\u0131zca <strong>tek bir SPF kayd\u0131<\/strong> olmal\u0131, t\u00fcm kurallar onun i\u00e7inde birle\u015fmeli).<\/li>\n<li>Alan ad\u0131 ta\u015f\u0131rken eski sa\u011flay\u0131c\u0131ya ait <code>include:<\/code> ifadelerini b\u0131rakmak.<\/li>\n<li>Teste ba\u015flamadan <code>-all<\/code> (sert reddetme) kullanmak ve me\u015fru maillerin de reddedilmesine sebep olmak.<\/li>\n<\/ul>\n<h2><span id=\"DKIM_Eposta_icerigini_kriptografik_olarak_imzalamak\">DKIM: E\u2011posta i\u00e7eri\u011fini kriptografik olarak imzalamak<\/span><\/h2>\n<p>DKIM (DomainKeys Identified Mail), g\u00f6nderdi\u011finiz e\u2011postalar\u0131n g\u00f6vdesini ve baz\u0131 ba\u015fl\u0131klar\u0131n\u0131, alan ad\u0131n\u0131za ait bir <strong>\u00f6zel anahtarla imzalayan<\/strong> bir mekanizmad\u0131r. Al\u0131c\u0131 taraf, DNS&#8217;te yay\u0131nlad\u0131\u011f\u0131n\u0131z <strong>a\u00e7\u0131k anahtarla<\/strong> bu imzay\u0131 do\u011frular. B\u00f6ylece mailin iletim s\u0131ras\u0131nda de\u011fi\u015ftirilmedi\u011fi ve ger\u00e7ekten yetkili bir sunucudan g\u00f6nderildi\u011fi kan\u0131tlanm\u0131\u015f olur.<\/p>\n<h3><span id=\"DKIM_nasil_calisir_ozet\">DKIM nas\u0131l \u00e7al\u0131\u015f\u0131r (\u00f6zet)<\/span><\/h3>\n<ol>\n<li>DCHost sunucunuz \u00fczerinde, e\u2011posta hizmeti aktif edildi\u011finde sizin alan ad\u0131n\u0131za \u00f6zel bir DKIM anahtar \u00e7ifti (\u00f6zel + a\u00e7\u0131k anahtar) olu\u015fturulur.<\/li>\n<li>\u00d6zel anahtar sunucuda saklan\u0131r; her giden mail, bu anahtarla imzalan\u0131r.<\/li>\n<li>A\u00e7\u0131k anahtar ise, alan ad\u0131n\u0131z\u0131n DNS&#8217;ine TXT kayd\u0131 olarak eklenir.<\/li>\n<li>Al\u0131c\u0131 sunucu, mailin ba\u015fl\u0131\u011f\u0131ndaki DKIM imzas\u0131n\u0131 okur, DNS&#8217;ten a\u00e7\u0131k anahtar\u0131 \u00e7eker ve imzay\u0131 do\u011frular.<\/li>\n<\/ol>\n<p>Kontrol panelinizde (cPanel, DirectAdmin vb.) genellikle &#8220;Email Deliverability&#8221; veya &#8220;DKIM&#8221; gibi bir b\u00f6l\u00fcm bulunur. Buradan alan ad\u0131n\u0131z\u0131 se\u00e7ti\u011finizde, sizin i\u00e7in otomatik olu\u015fturulmu\u015f bir TXT kayd\u0131 \u00e7\u0131kt\u0131s\u0131 g\u00f6r\u00fcrs\u00fcn\u00fcz. Bu \u00e7\u0131kt\u0131y\u0131 alan ad\u0131n\u0131z\u0131n DNS y\u00f6netim paneline birebir eklemeniz yeterlidir.<\/p>\n<h3><span id=\"DKIM_DNS_kaydinin_tipik_formu\">DKIM DNS kayd\u0131n\u0131n tipik formu<\/span><\/h3>\n<p>Genelde \u015fu yap\u0131da olur (\u00f6rnek):<\/p>\n<ul>\n<li>Host \/ Name: <code>default._domainkey<\/code> veya benzeri bir selector<\/li>\n<li>Tip: TXT<\/li>\n<li>De\u011fer: <code>v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBA...<\/code><\/li>\n<\/ul>\n<p>DKIM do\u011fru \u00e7al\u0131\u015ft\u0131\u011f\u0131nda, g\u00f6nderdi\u011finiz bir mailin ba\u015fl\u0131klar\u0131n\u0131 (headers) inceleyerek <code>DKIM-Signature<\/code> sat\u0131r\u0131n\u0131 g\u00f6rebilirsiniz. Ayr\u0131ca, Gmail gibi b\u00fcy\u00fck sa\u011flay\u0131c\u0131lara test maili at\u0131p &#8220;orijinal mesaj\u0131 g\u00f6ster&#8221; se\u00e7ene\u011fiyle de DKIM ge\u00e7ip ge\u00e7medi\u011fini kontrol edebilirsiniz.<\/p>\n<h2><span id=\"DMARC_ve_rDNS_ile_eposta_itibarini_guclendirmek\">DMARC ve rDNS ile e\u2011posta itibar\u0131n\u0131 g\u00fc\u00e7lendirmek<\/span><\/h2>\n<p>SPF ve DKIM&#8217;iniz haz\u0131r oldu\u011funda, s\u0131radaki ad\u0131m DMARC&#8217;t\u0131r (Domain-based Message Authentication, Reporting and Conformance). DMARC, SPF ve DKIM sonu\u00e7lar\u0131na bakarak, ba\u015far\u0131s\u0131z do\u011frulanan mailler i\u00e7in nas\u0131l bir politika uygulanaca\u011f\u0131n\u0131 tan\u0131mlar.<\/p>\n<h3><span id=\"Basit_bir_DMARC_kaydi_ornegi\">Basit bir DMARC kayd\u0131 \u00f6rne\u011fi<\/span><\/h3>\n<p>Ba\u015flang\u0131\u00e7 i\u00e7in yumu\u015fak, rapor odakl\u0131 bir DMARC kayd\u0131 \u015fu \u015fekilde olabilir:<\/p>\n<p><code>v=DMARC1; p=none; rua=mailto:dmarc-rapor@ornekfirma.com; fo=1<\/code><\/p>\n<p>Bunu da yine alan ad\u0131n\u0131z i\u00e7in bir TXT kayd\u0131 olarak eklersiniz:<\/p>\n<ul>\n<li>Host \/ Name: <code>_dmarc<\/code><\/li>\n<li>Tip: TXT<\/li>\n<li>De\u011fer: <code>v=DMARC1; p=none; rua=mailto:dmarc-rapor@ornekfirma.com; fo=1<\/code><\/li>\n<\/ul>\n<p>\u0130lk etapta <code>p=none<\/code> ile sadece rapor toplayabilir, sonra SPF\/DKIM kurulumunuzdan emin olduk\u00e7a <code>quarantine<\/code> ve <code>reject<\/code> seviyelerine ge\u00e7ebilirsiniz. Geli\u015fmi\u015f DMARC ve marka g\u00f6stergeleri (BIMI) taraf\u0131n\u0131 merak ediyorsan\u0131z, <a href=\"https:\/\/www.dchost.com\/blog\/gelismis-dmarc-ve-bimi-rua-ruf-raporlarindan-marka-gostergesine-nasil-yol-alinir\/\">geli\u015fmi\u015f DMARC ve BIMI rehberimize<\/a> g\u00f6z atabilirsiniz.<\/p>\n<h3><span id=\"rDNS_PTR_kaydi_ve_IP_itibarinin_onemi\">rDNS (PTR) kayd\u0131 ve IP itibar\u0131n\u0131n \u00f6nemi<\/span><\/h3>\n<p>\u00d6zellikle VPS veya <a href=\"https:\/\/www.dchost.com\/tr\/fiziksel-sunucu\">dedicated sunucu<\/a>da kendi MTA&#8217;n\u0131z\u0131 (Postfix, Exim vb.) \u00e7al\u0131\u015ft\u0131r\u0131yorsan\u0131z, IP adresiniz i\u00e7in do\u011fru bir <strong>PTR (reverse DNS)<\/strong> kayd\u0131 \u015fartt\u0131r. PTR, IP \u2192 host ad\u0131 e\u015flemesini tan\u0131mlar ve genelde e\u2011posta sunucunuzun HELO\/EHLO host ad\u0131yla tutarl\u0131 olmal\u0131d\u0131r. Bu konuyu pratik \u00f6rneklerle anlatt\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.dchost.com\/blog\/ptr-reverse-dns-kaydi-vps-ipniz-icin-dogru-ayar-ve-e-posta-teslimine-etkisi\/\">PTR (reverse DNS) rehberine<\/a> mutlaka g\u00f6z at\u0131n.<\/p>\n<p>SPF, DKIM, DMARC ve rDNS&#8217;i birlikte do\u011fru kurdu\u011funuzda, e\u2011posta teslim edilebilirli\u011finiz ciddi oranda artar. T\u00fcm bu ba\u015fl\u0131klar\u0131 bir arada, saha \u00f6rnekleriyle i\u015fledi\u011fimiz <a href=\"https:\/\/www.dchost.com\/blog\/spf-dkim-dmarc-ve-rdns-ile-e-posta-teslim-edilebilirligini-nasil-adim-adim-yukseltirsin\/\">teslim edilebilirlik rehberimiz<\/a> de elinizin alt\u0131nda olsun.<\/p>\n<h2><span id=\"Webmail_Tarayicidan_hizli_erisim_ve_pratik_kullanim\">Webmail: Taray\u0131c\u0131dan h\u0131zl\u0131 eri\u015fim ve pratik kullan\u0131m<\/span><\/h2>\n<p>MX, SPF, DKIM ve DMARC taraf\u0131n\u0131 kurduktan sonra, i\u015fin kullan\u0131c\u0131 deneyimi k\u0131sm\u0131na ge\u00e7ebiliriz. Webmail, ek bir yaz\u0131l\u0131m kurmadan, yaln\u0131zca taray\u0131c\u0131 \u00fczerinden kurumsal e\u2011posta hesaplar\u0131n\u0131za eri\u015fmenizi sa\u011flar.<\/p>\n<h3><span id=\"Webmail_adresi_ve_giris\">Webmail adresi ve giri\u015f<\/span><\/h3>\n<p>DCHost \u00fczerinde tipik webmail adresleri \u015fu \u015fekildedir:<\/p>\n<ul>\n<li><code>https:\/\/mail.alanadiniz.com\/webmail<\/code><\/li>\n<li>Veya do\u011frudan <code>https:\/\/alanadiniz.com\/webmail<\/code><\/li>\n<\/ul>\n<p>Giri\u015f bilgileriniz genelde \u015funlard\u0131r:<\/p>\n<ul>\n<li><strong>Kullan\u0131c\u0131 ad\u0131:<\/strong> tam e\u2011posta adresiniz (\u00f6rnek: bilgi@ornekfirma.com)<\/li>\n<li><strong>\u015eifre:<\/strong> hosting panelinden olu\u015fturdu\u011funuz g\u00fc\u00e7l\u00fc parola<\/li>\n<\/ul>\n<p>Webmail aray\u00fcz\u00fcnde gelen kutusu, klas\u00f6rler, filtreler, imza ekleme, otomatik yan\u0131t (ofis d\u0131\u015f\u0131) gibi temel \u00f6zellikler bulunur. Teknik olarak POP3\/IMAP kurmakla u\u011fra\u015fmak istemeyen kullan\u0131c\u0131lar i\u00e7in webmail \u00e7o\u011fu zaman fazlas\u0131yla yeterlidir.<\/p>\n<h3><span id=\"Webmail_ne_zaman_yeter_ne_zaman_istemci_gerekir\">Webmail ne zaman yeter, ne zaman istemci gerekir?<\/span><\/h3>\n<ul>\n<li>Ofis i\u00e7inde sabit bilgisayarlardan \u00e7al\u0131\u015f\u0131l\u0131yor ve herkes taray\u0131c\u0131 kullanmaya al\u0131\u015fk\u0131nsa, <strong>webmail tek ba\u015f\u0131na yeterli<\/strong> olabilir.<\/li>\n<li>Birden fazla cihazda (ofis bilgisayar\u0131, laptop, telefon) ayn\u0131 hesab\u0131 kullanmak ve klas\u00f6rleri senkron tutmak istiyorsan\u0131z, <strong>IMAP + webmail kombinasyonu<\/strong> idealdir.<\/li>\n<li>Offline \u00e7al\u0131\u015fma, geli\u015fmi\u015f kurallar, takvim entegrasyonu gibi \u00f6zellikler gerekiyorsa, <strong>MUA (Outlook, Thunderbird vb.) + IMAP<\/strong> kurman\u0131z daha do\u011fru olur.<\/li>\n<\/ul>\n<p>POP3, IMAP ve webmail aras\u0131ndaki farklar\u0131, yedekleme ve ar\u015fivleme etkilerini detayl\u0131 kar\u015f\u0131la\u015ft\u0131rd\u0131\u011f\u0131m\u0131z yaz\u0131m\u0131z\u0131 da inceleyin: <a href=\"https:\/\/www.dchost.com\/blog\/pop3-mu-imap-mi-webmail-mi-hosting-uzerinde-e-posta-erisim-ve-yedekleme-rehberi\/\">POP3 m\u00fc IMAP mi webmail mi?<\/a><\/p>\n<h2><span id=\"Outlook_Thunderbird_ve_mobil_cihazlarda_istemci_ayarlari\">Outlook, Thunderbird ve mobil cihazlarda istemci ayarlar\u0131<\/span><\/h2>\n<p>Bir\u00e7ok kullan\u0131c\u0131, kurumsal e\u2011postalar\u0131n\u0131 masa\u00fcst\u00fc bir istemci (Outlook, Thunderbird vb.) veya telefon\/tablet uygulamalar\u0131 \u00fczerinden kullanmak ister. Burada \u00f6nemli olan, <strong>do\u011fru protokol\u00fc se\u00e7mek<\/strong> ve <strong>g\u00fcvenli ba\u011flant\u0131 portlar\u0131n\u0131<\/strong> kullanmakt\u0131r.<\/p>\n<h3><span id=\"IMAP_mi_POP3_mu\">IMAP mi, POP3 m\u00fc?<\/span><\/h3>\n<p>\u00d6zetle:<\/p>\n<ul>\n<li><strong>IMAP:<\/strong> Mailler sunucuda tutulur, istemciler sadece senkronize olur. Birden \u00e7ok cihazdan kullan\u0131m i\u00e7in idealdir, klas\u00f6r yap\u0131n\u0131z her yerde ayn\u0131d\u0131r.<\/li>\n<li><strong>POP3:<\/strong> Varsay\u0131lan senaryo genelde mailleri sunucudan indirip silmek \u00fczerinedir. Sadece tek cihazdan kullan\u0131m i\u00e7in, ar\u015fivi o cihazda tutmak isteyenler i\u00e7in tercih edilebilir.<\/li>\n<\/ul>\n<p>Biz DCHost taraf\u0131nda, \u00f6zellikle kurumsal e\u2011posta senaryolar\u0131nda <strong>IMAP kullan\u0131m\u0131n\u0131<\/strong> g\u00fc\u00e7l\u00fc \u015fekilde \u00f6neriyoruz. Hem kay\u0131p riskini azalt\u0131r hem de cihaz de\u011fi\u015ftirme s\u00fcre\u00e7lerini \u00e7ok daha kolay hale getirir.<\/p>\n<h3><span id=\"Genel_gelen_mail_IMAPPOP3_ayarlari\">Genel gelen mail (IMAP\/POP3) ayarlar\u0131<\/span><\/h3>\n<p>Kontrol paneline g\u00f6re de\u011fi\u015fse de, DCHost \u00fczerinde tipik ayarlar \u015fu \u015fekildedir:<\/p>\n<ul>\n<li><strong>Gelen sunucu (IMAP):<\/strong> mail.alanadiniz.com<\/li>\n<li><strong>Port (IMAP SSL\/TLS):<\/strong> 993<\/li>\n<li><strong>Gelen sunucu (POP3):<\/strong> mail.alanadiniz.com<\/li>\n<li><strong>Port (POP3 SSL\/TLS):<\/strong> 995<\/li>\n<li><strong>Ba\u011flant\u0131 g\u00fcvenli\u011fi:<\/strong> SSL\/TLS<\/li>\n<li><strong>Kimlik do\u011frulama:<\/strong> Normal parola<\/li>\n<\/ul>\n<h3><span id=\"Giden_mail_SMTP_ayarlari\">Giden mail (SMTP) ayarlar\u0131<\/span><\/h3>\n<ul>\n<li><strong>SMTP sunucusu:<\/strong> mail.alanadiniz.com<\/li>\n<li><strong>Port (SSL\/TLS):<\/strong> 465 (veya STARTTLS i\u00e7in 587)<\/li>\n<li><strong>Ba\u011flant\u0131 g\u00fcvenli\u011fi:<\/strong> SSL\/TLS veya STARTTLS (m\u00fcmk\u00fcnse zorunlu)<\/li>\n<li><strong>Kimlik do\u011frulama:<\/strong> Giden sunucu, gelen sunucu ile ayn\u0131 kullan\u0131c\u0131 ad\u0131 ve \u015fifreyi kullanmal\u0131<\/li>\n<\/ul>\n<p>Bir hata ald\u0131\u011f\u0131n\u0131zda, \u00f6zellikle 5xx kodlar\u0131 (\u00f6rne\u011fin 550, 554) hata nedeni hakk\u0131nda ipucu verir. Bu kodlar\u0131 yorumlamak i\u00e7in haz\u0131rlad\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.dchost.com\/blog\/smtp-hata-kodlari-ve-bounce-mesajlari-rehberi\/\">SMTP hata kodlar\u0131 ve bounce mesajlar\u0131 rehberi<\/a> sorun \u00e7\u00f6zme s\u00fcrecinde \u00e7ok i\u015finize yarar.<\/p>\n<h3><span id=\"Mobil_cihazlarda_iOS_Android_kurulum_ipuclari\">Mobil cihazlarda (iOS \/ Android) kurulum ipu\u00e7lar\u0131<\/span><\/h3>\n<ul>\n<li>Hesap t\u00fcr\u00fc olarak mutlaka <strong>IMAP<\/strong> se\u00e7in.<\/li>\n<li>Gelen ve giden sunucu i\u00e7in <strong>ayn\u0131 host ad\u0131n\u0131<\/strong> (mail.alanadiniz.com) kullan\u0131n.<\/li>\n<li>SSL\/TLS se\u00e7ene\u011finin a\u00e7\u0131k oldu\u011fundan emin olun.<\/li>\n<li>Kullan\u0131c\u0131 ad\u0131 olarak tam e\u2011posta adresinizi yaz\u0131n (sadece kullan\u0131c\u0131 ad\u0131 de\u011fil).<\/li>\n<\/ul>\n<h2><span id=\"Test_izleme_ve_yayina_alma_kontrol_listesi\">Test, izleme ve yay\u0131na alma kontrol listesi<\/span><\/h2>\n<p>B\u00fct\u00fcn kay\u0131tlar\u0131 ve ayarlar\u0131 yapt\u0131ktan sonra, &#8220;tamam oldu&#8221; demeden \u00f6nce mutlaka kontroll\u00fc bir test s\u00fcreci y\u00fcr\u00fct\u00fcn. \u0130\u015fte sahada uygulad\u0131\u011f\u0131m\u0131z basit ama etkili bir kontrol listesi:<\/p>\n<ul>\n<li>Alan ad\u0131n\u0131z\u0131n MX, SPF, DKIM ve DMARC kay\u0131tlar\u0131n\u0131 \u00e7evrimi\u00e7i DNS ara\u00e7lar\u0131yla sorgulay\u0131n.<\/li>\n<li>Farkl\u0131 sa\u011flay\u0131c\u0131lardaki (kurumsal ve ki\u015fisel) en az 3\u20134 adrese test maili g\u00f6nderin.<\/li>\n<li>Bu test maillerinin ba\u015fl\u0131klar\u0131n\u0131 inceleyerek SPF ve DKIM sonu\u00e7lar\u0131n\u0131n <strong>pass<\/strong> oldu\u011funu do\u011frulay\u0131n.<\/li>\n<li>Spam klas\u00f6r\u00fcne d\u00fc\u015fen test mailleri varsa, i\u00e7erikteki link say\u0131s\u0131, spam tetikleyici kelimeler ve ek boyutlar\u0131n\u0131 da g\u00f6zden ge\u00e7irin.<\/li>\n<li>Al\u0131c\u0131 taraf\u0131nda bounce (geri d\u00f6n\u00fc\u015f) mesajlar\u0131 varsa, hata kodunu not al\u0131n ve ilgili sorunu \u00e7\u00f6z\u00fcn.<\/li>\n<li>Varsa eski sa\u011flay\u0131c\u0131n\u0131zdaki e\u2011posta kutular\u0131ndaki mailleri yeni hesaba IMAP senkronizasyonu ile ta\u015f\u0131y\u0131n.<\/li>\n<\/ul>\n<p>E\u2011posta altyap\u0131s\u0131n\u0131 ta\u015f\u0131rken minimum kesintiyle ilerlemek i\u00e7in \u00f6zellikle MX TTL de\u011ferleri ve s\u0131rayla ta\u015f\u0131ma ad\u0131mlar\u0131 \u00e7ok \u00f6nemli. Bu konuyu \u00f6zel olarak anlatt\u0131\u011f\u0131m\u0131z <a href=\"https:\/\/www.dchost.com\/blog\/e-posta-altyapisini-tasirken-kesinti-yasamamak\/\">e\u2011posta altyap\u0131s\u0131n\u0131 ta\u015f\u0131rken kesinti ya\u015famamak rehberini<\/a> yay\u0131na alma \u00f6ncesinde mutlaka okuyun.<\/p>\n<h2><span id=\"Sik_yapilan_hatalar_ve_gercek_senaryolar\">S\u0131k yap\u0131lan hatalar ve ger\u00e7ek senaryolar<\/span><\/h2>\n<p>DCHost taraf\u0131nda destek verirken defalarca kar\u015f\u0131la\u015ft\u0131\u011f\u0131m\u0131z baz\u0131 tipik senaryolar var. Bunlar\u0131 ba\u015ftan bilmek, ayn\u0131 tuzaklara d\u00fc\u015fmenizi engeller.<\/p>\n<h3><span id=\"Alan_adi_tasirken_MX_kayitlarini_unutmak\">Alan ad\u0131 ta\u015f\u0131rken MX kay\u0131tlar\u0131n\u0131 unutmak<\/span><\/h3>\n<p>En s\u0131k ya\u015fanan sorunlardan biri: Domaini bir registrardan di\u011ferine ta\u015f\u0131yorsunuz, web sitesi i\u00e7in A kayd\u0131n\u0131 yeni sunucuya i\u015faret ediyorsunuz ama MX ve TXT (SPF, DKIM, DMARC) kay\u0131tlar\u0131n\u0131 unutuyorsunuz. Sonu\u00e7; e\u2011postalar ya eski sa\u011flay\u0131c\u0131ya gitmeye devam ediyor ya da tamamen kayboluyor. <a href=\"https:\/\/www.dchost.com\/tr\/alan-adi\/transfer-et\">alan ad\u0131 transfer<\/a>i \u00f6ncesi ve sonras\u0131nda nelere dikkat etmeniz gerekti\u011fini <a href=\"https:\/\/www.dchost.com\/blog\/alan-adi-tasirken-e%e2%80%91posta-kesintisini-onlemek\/\">alan ad\u0131 ta\u015f\u0131rken e\u2011posta kesintisini \u00f6nleme rehberinde<\/a> detayl\u0131 anlatt\u0131k.<\/p>\n<h3><span id=\"Fazla_agresif_SPFDMARC_politikalari\">Fazla agresif SPF\/DMARC politikalar\u0131<\/span><\/h3>\n<p>&#8220;G\u00fcvenli olsun&#8221; derken SPF kayd\u0131n\u0131 <code>-all<\/code>, DMARC&#8217;\u0131 da do\u011frudan <code>p=reject<\/code> ile ba\u015flatan \u00e7ok g\u00f6r\u00fcyoruz. E\u011fer alan ad\u0131n\u0131z ad\u0131na mail g\u00f6nderen t\u00fcm servisleri (web sunucusundaki form, pazarlama ara\u00e7lar\u0131, fatura yaz\u0131l\u0131m\u0131 vb.) eksiksiz tan\u0131mlamad\u0131ysan\u0131z, bu yakla\u015f\u0131m me\u015fru maillerinizin de reddedilmesine yol a\u00e7\u0131yor. En do\u011frusu; \u00f6nce <code>p=none<\/code> ile DMARC raporlar\u0131n\u0131 izleyip, eksikleri giderdikten sonra politikay\u0131 sertle\u015ftirmek.<\/p>\n<h3><span id=\"POP3_kullanip_8220mailler_kayboldu8221_panigi\">POP3 kullan\u0131p &#8220;mailler kayboldu&#8221; pani\u011fi<\/span><\/h3>\n<p>\u00d6zellikle k\u00fc\u00e7\u00fck i\u015fletmelerde, ofisteki bir bilgisayara POP3 ile kurulan hesap, mailleri sunucudan indirip siliyor. Sonras\u0131nda ba\u015fka bir cihazdan mail g\u00f6rmek isteyen kullan\u0131c\u0131lar, &#8220;sunucuda mail yok&#8221; pani\u011fine kap\u0131l\u0131yor. Kurumsal senaryoda, \u00f6zellikle \u00e7oklu cihaz kullan\u0131m\u0131nda POP3 neredeyse her zaman yanl\u0131\u015f se\u00e7im. IMAP kullanmak, hem yedekleme hem de cihaz ba\u011f\u0131ms\u0131zl\u0131\u011f\u0131 a\u00e7\u0131s\u0131ndan \u00e7ok daha sa\u011fl\u0131kl\u0131.<\/p>\n<h3><span id=\"IP_veya_itibar_sorunlari\">IP veya itibar sorunlar\u0131<\/span><\/h3>\n<p>Nadiren de olsa, yeni bir IP adresi ald\u0131\u011f\u0131n\u0131zda veya sunucunuzu ta\u015f\u0131d\u0131\u011f\u0131n\u0131zda, ge\u00e7mi\u015fte k\u00f6t\u00fc ama\u00e7l\u0131 kullan\u0131lm\u0131\u015f bir IP&#8217;ye denk gelebilirsiniz. B\u00f6yle durumlarda mailleriniz baz\u0131 sa\u011flay\u0131c\u0131lara daha kolay spam olarak i\u015faretlenebilir. Bu durumda, <a href=\"https:\/\/www.dchost.com\/blog\/e-posta-itibarini-kurtarma-rehberi-blacklist-delisting-postmaster-araclari-ve-guvenli-ip-isitma-nasil-kurtarici-olur\/\">e\u2011posta itibar\u0131n\u0131 kurtarma rehberimizde<\/a> anlatt\u0131\u011f\u0131m\u0131z kara liste (blacklist) kontrolleri, delisting s\u00fcre\u00e7leri ve IP \u0131s\u0131tma (warming) stratejileri devreye girer.<\/p>\n<h2><span id=\"DCHost_ile_saglam_bir_kurumsal_eposta_altyapisi_kurmak\">DCHost ile sa\u011flam bir kurumsal e\u2011posta altyap\u0131s\u0131 kurmak<\/span><\/h2>\n<p>Kurumsal e\u2011posta, &#8220;hesap a\u00e7t\u0131m, bitti&#8221; diyebilece\u011finiz bir konu de\u011fil; do\u011fru alan ad\u0131, sa\u011flam bir hosting veya sunucu altyap\u0131s\u0131, d\u00fczg\u00fcn yap\u0131land\u0131r\u0131lm\u0131\u015f MX, SPF, DKIM, DMARC ve rDNS kay\u0131tlar\u0131, \u00fczerine de iyi ayarlanm\u0131\u015f webmail ve istemci konfig\u00fcrasyonu gerektiriyor. Biz DCHost olarak hem <a href=\"https:\/\/www.dchost.com\/tr\/web-hosting\">payla\u015f\u0131ml\u0131 hosting<\/a> paketlerimizde hem de VPS, dedicated ve colocation \u00e7\u00f6z\u00fcmlerimizde bu mimariyi ba\u015ftan planlayarak ilerliyoruz.<\/p>\n<p>\u0130htiyac\u0131n\u0131z az say\u0131da hesap ve temel kullan\u0131m d\u00fczeyindeyse, alan ad\u0131n\u0131z\u0131 kolayca ba\u011flayabilece\u011finiz payla\u015f\u0131ml\u0131 hosting paketlerimiz \u00e7o\u011fu zaman yeterli oluyor. E\u2011posta trafi\u011finiz y\u00fcksek, log saklama s\u00fcreleriniz kritik veya mevzuat gere\u011fi daha s\u0131k\u0131 g\u00fcvenlik ve \u00f6zelle\u015ftirme istiyorsan\u0131z, DCHost VPS ve dedicated sunucu \u00e7\u00f6z\u00fcmlerimizle SPF, DKIM, DMARC, MTA\u2011STS, TLS\u2011RPT gibi geli\u015fmi\u015f \u00f6zellikleri de devreye alarak tamamen size \u00f6zel bir kurumsal e\u2011posta altyap\u0131s\u0131 tasarl\u0131yoruz.<\/p>\n<p>Yeni alan ad\u0131n\u0131z\u0131 ald\u0131ysan\u0131z ve hem web sitenizi hem de kurumsal e\u2011postalar\u0131n\u0131z\u0131 g\u00fcvenli, h\u0131zl\u0131 ve y\u00f6netilebilir bir altyap\u0131ya ta\u015f\u0131mak istiyorsan\u0131z, DCHost ekibiyle ileti\u015fime ge\u00e7in. Mevcut durumunuzu birlikte analiz edelim, do\u011fru plan\u0131 \u00e7\u0131karal\u0131m ve MX, SPF, DKIM, DMARC, webmail ve istemci ayarlar\u0131n\u0131 ba\u015ftan sona birlikte kural\u0131m. B\u00f6ylece siz i\u015finize odaklan\u0131rken, e\u2011postalar\u0131n\u0131z arka planda sessizce ama hatas\u0131z \u00e7al\u0131\u015fs\u0131n.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>\u0130&ccedil;indekiler1 Kendi alan ad\u0131n\u0131zla kurumsal e\u2011posta kullanman\u0131n i\u015finize etkisi2 Altyap\u0131y\u0131 planlamak: Domain, hosting ve DNS taraf\u01312.1 Hangi altyap\u0131y\u0131 kullanmal\u0131y\u0131m?2.2 DNS temel kavramlar: MX, A ve TXT kay\u0131tlar\u01313 MX kay\u0131tlar\u0131yla e\u2011postay\u0131 do\u011fru sunucuya y\u00f6nlendirmek3.1 Temel MX senaryosu3.2 DCHost panelinde MX kayd\u0131 ekleme ad\u0131mlar\u0131 (genel mant\u0131k)4 SPF: Alan ad\u0131n\u0131z ad\u0131na kimlerin e\u2011posta g\u00f6nderebilece\u011fini tan\u0131mlamak4.1 Basit bir SPF [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3003,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-3002","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-teknoloji"],"_links":{"self":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts\/3002","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/comments?post=3002"}],"version-history":[{"count":0,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/posts\/3002\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/media\/3003"}],"wp:attachment":[{"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/media?parent=3002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/categories?post=3002"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.dchost.com\/blog\/wp-json\/wp\/v2\/tags?post=3002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}