{"id":18,"date":"2026-06-01T12:21:49","date_gmt":"2026-06-01T09:21:49","guid":{"rendered":"https:\/\/secradar.net\/blog\/spf-dkim-dmarc-eposta-guvenligi\/"},"modified":"2026-06-04T22:45:37","modified_gmt":"2026-06-04T19:45:37","slug":"spf-dkim-dmarc-eposta-guvenligi","status":"publish","type":"post","link":"https:\/\/secradar.net\/blog\/spf-dkim-dmarc-eposta-guvenligi\/","title":{"rendered":"SPF, DKIM ve DMARC ile E-posta G\u00fcvenli\u011fi Nas\u0131l Sa\u011flan\u0131r?"},"content":{"rendered":"

E-posta sahtecili\u011fi (spoofing), sald\u0131rganlar\u0131n sizin alan ad\u0131n\u0131zdan e-posta g\u00f6nderiyormu\u015f gibi g\u00f6r\u00fcnmesidir. SPF, DKIM ve DMARC bu \u00fc\u00e7l\u00fcs\u00fc, alan ad\u0131n\u0131z\u0131 koruyan ve e-posta teslim oran\u0131n\u0131z\u0131 art\u0131ran DNS kay\u0131tlar\u0131d\u0131r.<\/p>\n

SPF (Sender Policy Framework)<\/h2>\n

Alan ad\u0131n\u0131z ad\u0131na hangi sunucular\u0131n e-posta g\u00f6nderebilece\u011fini belirten bir TXT kayd\u0131d\u0131r. \u00d6rnek: v=spf1 include:_spf.google.com ~all<\/code>. Listede olmayan sunuculardan gelen postalar \u015f\u00fcpheli say\u0131l\u0131r.<\/p>\n

DKIM (DomainKeys Identified Mail)<\/h2>\n

Giden e-postalar\u0131 kriptografik bir imzayla imzalar. Al\u0131c\u0131 sunucu, imzay\u0131 alan ad\u0131n\u0131z\u0131n DNS’indeki a\u00e7\u0131k anahtarla do\u011frular; b\u00f6ylece i\u00e7eri\u011fin de\u011fi\u015ftirilmedi\u011fi kan\u0131tlan\u0131r.<\/p>\n

DMARC (Domain-based Message Authentication)<\/h2>\n

SPF ve DKIM ba\u015far\u0131s\u0131z oldu\u011funda ne yap\u0131laca\u011f\u0131n\u0131 (none\/quarantine\/reject) belirler ve size rapor g\u00f6nderir. _dmarc.alanadiniz.com<\/code> alt\u0131nda bir TXT kayd\u0131d\u0131r: v=DMARC1; p=quarantine; rua=mailto:dmarc@alanadiniz.com<\/code><\/p>\n

Neden \u00dc\u00e7\u00fc Birden Gerekli?<\/h2>\n

SPF g\u00f6nderen sunucuyu, DKIM i\u00e7eri\u011fin b\u00fct\u00fcnl\u00fc\u011f\u00fcn\u00fc do\u011frular; DMARC ise ikisini birle\u015ftirip politika uygular. \u00dc\u00e7\u00fc birlikte kullan\u0131ld\u0131\u011f\u0131nda alan ad\u0131n\u0131zdan sahte e-posta g\u00f6nderilmesi neredeyse imk\u00e2ns\u0131z h\u00e2le gelir.<\/p>\n

Kay\u0131tlar\u0131n\u0131z\u0131 Kontrol Edin<\/h2>\n

Alan ad\u0131n\u0131z\u0131n TXT kay\u0131tlar\u0131n\u0131 ve SPF tan\u0131m\u0131n\u0131 DNS sorgulama arac\u0131m\u0131zla<\/a> g\u00f6r\u00fcnt\u00fcleyebilirsiniz.<\/p>\n","protected":false},"excerpt":{"rendered":"

E-posta sahtecili\u011fi (spoofing), sald\u0131rganlar\u0131n sizin alan ad\u0131n\u0131zdan e-posta g\u00f6nderiyormu\u015f gibi g\u00f6r\u00fcnmesidir. SPF, DKIM ve DMARC bu \u00fc\u00e7l\u00fcs\u00fc, alan ad\u0131n\u0131z\u0131 koruyan ve e-posta teslim oran\u0131n\u0131z\u0131 art\u0131ran DNS kay\u0131tlar\u0131d\u0131r. SPF (Sender Policy Framework) Alan ad\u0131n\u0131z ad\u0131na hangi sunucular\u0131n e-posta g\u00f6nderebilece\u011fini belirten bir TXT kayd\u0131d\u0131r. \u00d6rnek: v=spf1 include:_spf.google.com ~all. Listede olmayan sunuculardan gelen postalar \u015f\u00fcpheli say\u0131l\u0131r. DKIM (DomainKeys … Devam\u0131n\u0131 oku<\/a><\/p>\n","protected":false},"author":1,"featured_media":17,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-18","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dns"],"_links":{"self":[{"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/posts\/18","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/comments?post=18"}],"version-history":[{"count":1,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/posts\/18\/revisions"}],"predecessor-version":[{"id":46,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/posts\/18\/revisions\/46"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/media\/17"}],"wp:attachment":[{"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/media?parent=18"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/categories?post=18"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/secradar.net\/blog\/wp-json\/wp\/v2\/tags?post=18"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}