{"id":29849,"date":"2025-09-20T17:40:24","date_gmt":"2025-09-20T14:40:24","guid":{"rendered":"https:\/\/fatihsoysal.com\/blog\/ubuntu-22-04te-postfixi-sadece-gonderim-icin-smtp-sunucusu-olarak-kurma-ve-yap\/"},"modified":"2025-09-20T17:40:24","modified_gmt":"2025-09-20T14:40:24","slug":"ubuntu-22-04te-postfixi-sadece-gonderim-icin-smtp-sunucusu-olarak-kurma-ve-yap","status":"publish","type":"post","link":"https:\/\/fatihsoysal.com\/blog\/ubuntu-22-04te-postfixi-sadece-gonderim-icin-smtp-sunucusu-olarak-kurma-ve-yap\/","title":{"rendered":"Ubuntu 22.04’te Postfix’i Sadece G\u00f6nderim \u0130\u00e7in SMTP Sunucusu Olarak Kurma ve Yap"},"content":{"rendered":"

# Ubuntu 22.04’te Sadece G\u00f6nderim Yapan SMTP Sunucusu Olarak Postfix Kurulumu ve Yap\u0131land\u0131rmas\u0131<\/p>\n

E-posta g\u00f6nderimi i\u00e7in g\u00fcvenilir ve verimli bir \u00e7\u00f6z\u00fcm m\u00fc ar\u0131yorsunuz? \u0130\u015fletmeniz i\u00e7in veya ki\u015fisel kullan\u0131m\u0131n\u0131z i\u00e7in kendi SMTP sunucunuzu kurmak, e-posta teslimat\u0131n\u0131 kontrol alt\u0131na alman\u0131n ve spam filtreleme gibi geli\u015fmi\u015f \u00f6zelliklerden yararlanman\u0131n harika bir yoludur. Bu makalede, Ubuntu 22.04 \u00fczerinde sadece g\u00f6nderim yapan (send-only) bir Postfix SMTP sunucusunun nas\u0131l kurulaca\u011f\u0131n\u0131 ve yap\u0131land\u0131r\u0131laca\u011f\u0131n\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klayaca\u011f\u0131z. G\u00fcvenlik entegrasyonuna ve performans optimizasyonuna \u00f6zel \u00f6nem verece\u011fiz.<\/p>\n

\u00d6\u011frenme Yol Haritas\u0131:<\/strong><\/p>\n

* Yeni Ba\u015flayan:<\/strong> Ad\u0131m ad\u0131m kurulum, temel yap\u0131land\u0131rma, basit bir test e-postas\u0131 g\u00f6nderimi.
\n* Orta:<\/strong> Ger\u00e7ek d\u00fcnya senaryolar\u0131, DNS kay\u0131tlar\u0131 ekleme, SPF, DKIM ve DMARC ayarlar\u0131, performans ipu\u00e7lar\u0131.
\n* \u0130leri D\u00fczey:<\/strong> Postfix performans analizi, log dosyas\u0131 analizi, olas\u0131 sorunlar ve \u00e7\u00f6z\u00fcmleri (edge case’ler), y\u00fcksek hacimli e-posta g\u00f6nderimi i\u00e7in optimizasyon.<\/p>\n

Postfix ve SMTP Temelleri: Nelerdir ve Neden \u00d6nemlidir?<\/strong><\/p>\n

Postfix, g\u00fc\u00e7l\u00fc ve pop\u00fcler bir a\u00e7\u0131k kaynak MTA (Mail Transfer Agent) yaz\u0131l\u0131m\u0131d\u0131r. SMTP (Simple Mail Transfer Protocol), e-posta sunucular\u0131 aras\u0131nda e-posta mesajlar\u0131n\u0131n g\u00f6nderilmesi i\u00e7in kullan\u0131lan standart bir protokold\u00fcr. Bir send-only SMTP sunucusu, sadece e-posta g\u00f6ndermek i\u00e7in kullan\u0131l\u0131r; gelen e-postalar\u0131 kabul etmez. Bu, g\u00fcvenlik a\u00e7\u0131s\u0131ndan \u00f6nemli bir avantajd\u0131r \u00e7\u00fcnk\u00fc gelen e-postalar\u0131n i\u015flenmesiyle ilgili g\u00fcvenlik a\u00e7\u0131klar\u0131ndan korunman\u0131z\u0131 sa\u011flar. Bu yap\u0131land\u0131rma, \u00f6zellikle b\u00fcy\u00fck miktarda e-posta g\u00f6ndermeniz gereken toplu e-posta kampanyalar\u0131 veya haber b\u00fcltenleri i\u00e7in idealdir. Kendi SMTP sunucunuzu y\u00f6netmek, e-posta g\u00f6nderiminiz \u00fczerinde daha fazla kontrol sa\u011flar ve teslimat oranlar\u0131n\u0131 art\u0131rman\u0131za yard\u0131mc\u0131 olur. Ayr\u0131ca, g\u00fcvenilir bir e-posta g\u00f6nderim altyap\u0131s\u0131 olu\u015fturarak markan\u0131z\u0131n itibar\u0131n\u0131 koruman\u0131za olanak tan\u0131r.<\/p>\n

1. Ubuntu 22.04 Sunucusunun Haz\u0131rlanmas\u0131: Paket Y\u00f6neticisi ve G\u00fcncellemeler<\/strong><\/p>\n

\u0130lk ad\u0131m\u0131m\u0131z, Ubuntu 22.04 sunucumuzun haz\u0131rlanmas\u0131. G\u00fcvenli ve stabil bir ortam sa\u011flamak i\u00e7in sistem g\u00fcncellemelerini yapmam\u0131z gerekiyor. Bunun i\u00e7in a\u015fa\u011f\u0131daki komutlar\u0131 \u00e7al\u0131\u015ft\u0131r\u0131n:<\/p>\n

sudo apt update\nsudo apt upgrade -y<\/code><\/pre>\n
Bu komutlar, paket listesini g\u00fcncelleyerek mevcut t\u00fcm g\u00fcncellemeleri indirip kuracakt\u0131r.  Sisteminizi yeniden ba\u015flatman\u0131z gerekebilir.  Bu ad\u0131m, olas\u0131 g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 giderir ve Postfix’in sorunsuz \u00e7al\u0131\u015fmas\u0131n\u0131 sa\u011flar.  Sistem g\u00fcncellemelerinden sonra, Postfix kurulumuna ba\u015flayabiliriz.<\/p>\n
2. Postfix Kurulumu ve Temel Yap\u0131land\u0131rma:  Yeni Ba\u015flayanlar \u0130\u00e7in Ad\u0131m Ad\u0131m<\/strong><\/p>\n
Postfix’i kurmak i\u00e7in a\u015fa\u011f\u0131daki komutu kullan\u0131n:<\/p>\n
sudo apt install postfix -y<\/code><\/pre>\n
Kurulum s\u0131ras\u0131nda size birka\u00e7 soru sorulacakt\u0131r.  “Internet Site<\/strong>” se\u00e7ene\u011fini se\u00e7in.  Bu, Postfix’in internet \u00fczerinden e-posta g\u00f6ndermesine izin verecektir.  Daha sonra, sunucunuzun tam etki alan\u0131n\u0131 (\u00f6rne\u011fin, example.com<\/code>) girmeniz istenecektir.  Bu alan ad\u0131n\u0131n DNS’de do\u011fru bir \u015fekilde yap\u0131land\u0131r\u0131lm\u0131\u015f olmas\u0131 \u00e7ok \u00f6nemlidir.  Yanl\u0131\u015f bir alan ad\u0131 girmeniz, e-postalar\u0131n\u0131z\u0131n teslim edilememesine neden olabilir.  Kurulum tamamland\u0131ktan sonra, Postfix’in \u00e7al\u0131\u015ft\u0131\u011f\u0131ndan emin olmak i\u00e7in a\u015fa\u011f\u0131daki komutu kullanabilirsiniz:<\/p>\n
sudo systemctl status postfix<\/code><\/pre>\n
\u00c7\u0131kt\u0131, Postfix’in aktif ve \u00e7al\u0131\u015f\u0131r durumda oldu\u011funu g\u00f6stermelidir.  Bu ad\u0131m, Postfix’i sisteminize kurar ve temel ayarlar\u0131n\u0131 yapar.  Ancak, bu yaln\u0131zca ba\u015flang\u0131\u00e7t\u0131r;  g\u00fcvenli ve etkili bir send-only SMTP sunucusu i\u00e7in daha fazla yap\u0131land\u0131rma gereklidir.<\/p>\n
3.  Postfix’i Sadece G\u00f6nderim Yapan (Send-Only) Olarak Yap\u0131land\u0131rma: Orta Seviye<\/strong><\/p>\n
Postfix’i sadece g\u00f6nderim yapan bir sunucu olarak yap\u0131land\u0131rmak i\u00e7in \/etc\/postfix\/main.cf<\/code> dosyas\u0131n\u0131 d\u00fczenlememiz gerekiyor.  Bunun i\u00e7in bir metin edit\u00f6r\u00fc kullanabilirsiniz:<\/p>\n
sudo nano \/etc\/postfix\/main.cf<\/code><\/pre>\n
Bu dosyaya a\u015fa\u011f\u0131daki sat\u0131r\u0131 ekleyin veya var olan sat\u0131rlar\u0131 de\u011fi\u015ftirin:<\/p>\n
mydestination = $myhostname, localhost.$mydomain, localhost\nmynetworks = 127.0.0.0\/8 [::ffff:127.0.0.0]\/104 [::1]\/128\ninet_interfaces = all\nmyorigin = $myhostname\nrelayhost = [smtp.example.com]:587  # Veya farkl\u0131 bir relayhost kullanabilirsiniz.\nsmtp_sasl_auth_enable = yes\nsmtp_sasl_password_maps = hash:\/etc\/postfix\/sasl_passwd\nsmtp_sasl_security_options = noanonymous<\/code><\/pre>\n
\u00d6nemli Not:<\/strong> relayhost<\/code> sat\u0131r\u0131nda, g\u00fcvenilir bir SMTP sunucusu (\u00f6rne\u011fin, Google Workspace veya ba\u015fka bir \u00fc\u00e7\u00fcnc\u00fc taraf sa\u011flay\u0131c\u0131) kullanman\u0131z gerekir.  Bu relayhost, e-postalar\u0131n\u0131z\u0131 internette teslim etmek i\u00e7in kullan\u0131lacakt\u0131r.  smtp.example.com<\/code> yerine kendi relayhost adresinizi kullanmay\u0131 unutmay\u0131n.  Ayr\u0131ca, g\u00fcvenlik nedeniyle,  relayhost’unuzun g\u00fcvenli bir ba\u011flant\u0131 (TLS\/SSL) kullanmas\u0131n\u0131 sa\u011flaman\u0131z \u00f6nerilir.<\/p>\n
Bu de\u011fi\u015fiklikleri yapt\u0131ktan sonra dosyay\u0131 kaydedin ve Postfix’i yeniden ba\u015flat\u0131n:<\/p>\n
sudo postfix reload<\/code><\/pre>\n
Bu ad\u0131m, Postfix’i sadece g\u00f6nderim yapan bir sunucu olarak yap\u0131land\u0131r\u0131r ve g\u00fcvenlik a\u00e7\u0131klar\u0131n\u0131 \u00f6nlemek i\u00e7in \u00f6nemli ayarlar yapar.<\/p>\n
4.  Relayhost Kimlik Bilgilerini Yap\u0131land\u0131rma ve Test G\u00f6nderimi<\/strong><\/p>\n
\/etc\/postfix\/sasl_passwd<\/code> dosyas\u0131n\u0131 olu\u015fturup relayhost’unuzun kullan\u0131c\u0131 ad\u0131 ve \u015fifresini eklemeniz gerekir.  Bu dosya hassas bilgiler i\u00e7erdi\u011fi i\u00e7in dikkatli olunmal\u0131d\u0131r.<\/p>\n
sudo nano \/etc\/postfix\/sasl_passwd<\/code><\/pre>\n
Dosyaya a\u015fa\u011f\u0131daki gibi bir sat\u0131r ekleyin:<\/p>\n
[smtp.example.com]:587    kullanici_adi:sifre<\/code><\/pre>\n
\u00d6nemli Not:<\/strong>  kullanici_adi<\/code> ve sifre<\/code> yerine relayhost’unuzun kullan\u0131c\u0131 ad\u0131 ve \u015fifresini kullan\u0131n.  Bu bilgileri g\u00fcvenli bir \u015fekilde saklaman\u0131z \u00e7ok \u00f6nemlidir.  Bu dosyay\u0131 yanl\u0131\u015fl\u0131kla payla\u015fmaktan ka\u00e7\u0131n\u0131n.<\/p>\n
Dosyay\u0131 kaydettikten sonra, \u015fifreleri Postfix i\u00e7in okunabilir hale getirmemiz gerekiyor:<\/p>\n
sudo postmap \/etc\/postfix\/sasl_passwd\nsudo chmod 600 \/etc\/postfix\/sasl_passwd<\/code><\/pre>\n
Son olarak, Postfix’i yeniden ba\u015flat\u0131n:<\/p>\n
sudo postfix reload<\/code><\/pre>\n
\u015eimdi, bir test e-postas\u0131 g\u00f6ndererek Postfix’in do\u011fru \u00e7al\u0131\u015f\u0131p \u00e7al\u0131\u015fmad\u0131\u011f\u0131n\u0131 kontrol edebilirsiniz.  sendmail<\/code> komutunu kullanarak bir e-posta g\u00f6nderebilirsiniz:<\/p>\n
echo "Test e-postas\u0131" | sudo sendmail -f test@example.com hedef_eposta@example.com<\/code><\/pre>\n
E-postan\u0131z ba\u015far\u0131yla teslim edildiyse, Postfix kurulumunuz ba\u015far\u0131l\u0131 olmu\u015ftur.<\/p>\n
5. DNS Kay\u0131tlar\u0131 ve SPF, DKIM, DMARC Ayarlar\u0131:  G\u00fcvenilirlik ve Teslimat<\/strong><\/p>\n
E-postalar\u0131n\u0131z\u0131n spam olarak i\u015faretlenmesini \u00f6nlemek ve teslimat oranlar\u0131n\u0131 art\u0131rmak i\u00e7in SPF (Sender Policy Framework), DKIM (DomainKeys Identified Mail), ve DMARC (Domain-based Message Authentication, Reporting & Conformance) kay\u0131tlar\u0131n\u0131 do\u011fru bir \u015fekilde yap\u0131land\u0131rman\u0131z gerekir.  Bu kay\u0131tlar, e-postan\u0131z\u0131n kimli\u011finin do\u011frulanmas\u0131n\u0131 sa\u011flar ve al\u0131c\u0131 sunucular\u0131n\u0131n e-postalar\u0131n\u0131z\u0131 g\u00fcvenilir olarak i\u015faretlemesine yard\u0131mc\u0131 olur.  Bu kay\u0131tlar\u0131 alan ad\u0131 kay\u0131tlar\u0131n\u0131za (DNS) eklemeniz gerekecektir.  Bu ad\u0131m, e-posta teslimat\u0131n\u0131 iyile\u015ftirmek ve g\u00fcvenilirli\u011fi art\u0131rmak i\u00e7in \u00e7ok \u00f6nemlidir.  Bu konuda daha detayl\u0131 bilgi i\u00e7in  [fatihsoysal.com](https:\/\/fatihsoysal.com) sitesini ziyaret edebilirsiniz. (Buraya ilgili bir makale ba\u011flant\u0131s\u0131 eklenebilir).<\/p>\n
6.  Performans Optimizasyonu ve Y\u00fcksek Hacimli E-posta G\u00f6nderimi: \u0130leri D\u00fczey<\/strong><\/p>\n
Y\u00fcksek hacimli e-posta g\u00f6nderimi yap\u0131yorsan\u0131z, Postfix’in performans\u0131n\u0131 optimize etmeniz gerekebilir.  Bunun i\u00e7in a\u015fa\u011f\u0131daki ad\u0131mlar\u0131 izleyebilirsiniz:<\/p>\n
* master.cf<\/code> dosyas\u0131n\u0131 inceleyin:<\/strong> Postfix’in performans\u0131n\u0131 etkileyebilecek ayarlar\u0131 inceleyin ve gerekti\u011finde de\u011fi\u015ftirin.
\n* Postfix’in \u00e7al\u0131\u015ft\u0131\u011f\u0131 sunucunun kaynaklar\u0131n\u0131 art\u0131r\u0131n:<\/strong> Daha fazla RAM ve i\u015flem g\u00fcc\u00fc, y\u00fcksek hacimli e-posta g\u00f6nderiminde performans\u0131 art\u0131racakt\u0131r.
\n* \u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 kullan\u0131n:<\/strong> Postfix’in \u00e7oklu i\u015f par\u00e7ac\u0131\u011f\u0131n\u0131 etkinle\u015ftirmek, e-posta g\u00f6nderimini h\u0131zland\u0131rabilir.
\n* Postfix’in log dosyalar\u0131n\u0131 d\u00fczenli olarak izleyin:<\/strong> Log dosyalar\u0131, olas\u0131 sorunlar\u0131 ve performans darbo\u011fazlar\u0131n\u0131 tespit etmenize yard\u0131mc\u0131 olabilir.<\/p>\n
7.  Olas\u0131 Sorunlar ve \u00c7\u00f6z\u00fcmleri (Edge Case’ler):  Hata Ay\u0131klama ve Sorun Giderme<\/strong><\/p>\n
Postfix kurulumu s\u0131ras\u0131nda veya sonras\u0131nda \u00e7e\u015fitli sorunlarla kar\u015f\u0131la\u015fabilirsiniz.  \u00d6rne\u011fin, e-postalar\u0131n\u0131z teslim edilmeyebilir veya spam olarak i\u015faretlenebilir.  Bu t\u00fcr sorunlar\u0131 gidermek i\u00e7in log dosyalar\u0131n\u0131 dikkatlice inceleyin ve DNS kay\u0131tlar\u0131n\u0131z\u0131 do\u011frulay\u0131n.  Ayr\u0131ca, Postfix’in yap\u0131land\u0131rma dosyalar\u0131n\u0131 kontrol ederek yanl\u0131\u015f ayarlar\u0131 tespit edebilirsiniz.  [fatihsoysal.com](https:\/\/fatihsoysal.com) sitesinde bu konuda daha fazla bilgi bulabilirsiniz (Buraya ilgili bir makale ba\u011flant\u0131s\u0131 eklenebilir).<\/p>\n
Sonu\u00e7<\/strong><\/p>\n
Bu makalede, Ubuntu 22.04 \u00fczerinde sadece g\u00f6nderim yapan bir Postfix SMTP sunucusunun nas\u0131l kurulaca\u011f\u0131n\u0131 ve yap\u0131land\u0131r\u0131laca\u011f\u0131n\u0131 ad\u0131m ad\u0131m a\u00e7\u0131klad\u0131k.  G\u00fcvenlik ve performans optimizasyonuna odaklanarak, g\u00fcvenilir ve verimli bir e-posta g\u00f6nderim sistemi kurman\u0131za yard\u0131mc\u0131 olduk.  Unutmay\u0131n ki, g\u00fcvenli ve etkili bir e-posta altyap\u0131s\u0131 kurmak i\u00e7in d\u00fczenli bak\u0131m ve g\u00fcncellemeler \u00e7ok \u00f6nemlidir.<\/p>\n
S\u0131k\u00e7a Sorulan Sorular (SSS):<\/strong><\/p>\n
1. Postfix’i yeniden ba\u015flatmak neden \u00f6nemlidir?<\/strong> Yap\u0131land\u0131rma de\u011fi\u015fikliklerinin etkili olmas\u0131 i\u00e7in Postfix’in yeniden ba\u015flat\u0131lmas\u0131 gerekir.
\n2. Relayhost nedir ve neden gereklidir?<\/strong> Relayhost, e-postalar\u0131n\u0131z\u0131 internet \u00fczerinden teslim etmek i\u00e7in kullan\u0131lan bir ara sunucudur.
\n3. SPF, DKIM ve DMARC kay\u0131tlar\u0131 neden \u00f6nemlidir?<\/strong> Bu kay\u0131tlar, e-postalar\u0131n\u0131z\u0131n kimli\u011fini do\u011frular ve spam filtrelemeyi ge\u00e7me olas\u0131l\u0131\u011f\u0131n\u0131 art\u0131r\u0131r.
\n4. Postfix log dosyalar\u0131n\u0131 nerede bulabilirim?<\/strong> Genellikle \/var\/log\/mail.log<\/code> dosyas\u0131nda bulunur.
\n5. Y\u00fcksek hacimli e-posta g\u00f6nderimi i\u00e7in hangi optimizasyon teknikleri kullan\u0131labilir?<\/strong> \u00c7oklu i\u015f par\u00e7ac\u0131\u011f\u0131, kaynak optimizasyonu ve kuyruk y\u00f6netimi gibi teknikler kullan\u0131labilir.<\/p>\n
Yazar: Fatih Soysal<\/p>\n","protected":false},"excerpt":{"rendered":"# Ubuntu 22.04’te Sadece G\u00f6nderim Yapan SMTP Sunucusu Olarak Postfix Kurulumu ve Yap\u0131land\u0131rmas\u0131 E-posta g\u00f6nderimi i\u00e7in g\u00fcvenilir ve…","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"csco_page_header_type":"","csco_page_load_nextpost":"","csco_page_subscribe_form":"","csco_page_contact_form":"","footnotes":""},"categories":[1468],"tags":[],"class_list":{"0":"post-29849","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-ubuntu","7":"cs-entry","8":"cs-video-wrap"},"yoast_head":"\nUbuntu 22.04'te Postfix'i Sadece G\u00f6nderim \u0130\u00e7in SMTP Sunucusu Olarak Kurma ve Yap<\/title>\n<meta name=\"description\" content=\"Hi\u00e7bir etiketi bulunamad\u0131.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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