{"id":34,"date":"2026-09-28T12:12:51","date_gmt":"2026-09-28T09:12:51","guid":{"rendered":"https:\/\/mx1mail.com\/blog\/what-is-dkim-why-is-it-important\/"},"modified":"2026-09-28T12:12:51","modified_gmt":"2026-09-28T09:12:51","slug":"what-is-dkim-why-is-it-important","status":"publish","type":"post","link":"https:\/\/mx1mail.com\/blog\/en\/what-is-dkim-why-is-it-important\/","title":{"rendered":"What Is DKIM and Why Is It Important?"},"content":{"rendered":"<p>DKIM stands for DomainKeys Identified Mail. It adds a cryptographic signature to outgoing email so the receiving server can verify that the message was signed by an authorized system.<\/p>\n<h2>How does DKIM work?<\/h2>\n<p>The sending mail server signs selected parts of the message with a private key. The receiving server retrieves the corresponding public key from the sender domain&#8217;s DNS records and verifies the signature.<\/p>\n<h2>What does DKIM prove?<\/h2>\n<p>A successful DKIM verification indicates that the message was signed for a specific domain and that the signed portions were not modified in transit.<\/p>\n<h2>What is a DKIM selector?<\/h2>\n<p>DKIM keys are published under identifiers known as selectors. This allows a domain to use multiple keys and rotate them over time.<\/p>\n<h2>Why does DKIM matter?<\/h2>\n<p>DKIM contributes to both domain security and email deliverability. It is also one of the authentication mechanisms evaluated by DMARC.<\/p>\n<h2>How is DKIM different from SPF?<\/h2>\n<p>SPF evaluates whether a sending server is authorized, while DKIM verifies a cryptographic signature attached to the message. The two technologies complement each other.<\/p>\n<p>Continue with our guide: <a href=\"https:\/\/mx1mail.com\/blog\/en\/what-is-spf-how-does-it-work\/\">What Is SPF?<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Learn how DKIM cryptographic signatures help verify message integrity and domain identity and why DKIM matters for business email security.<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[106,116],"class_list":["post-34","post","type-post","status-publish","format-standard","hentry","category-technical-guides","tag-dkim-en","tag-email-security"],"_links":{"self":[{"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/posts\/34","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/comments?post=34"}],"version-history":[{"count":0,"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/posts\/34\/revisions"}],"wp:attachment":[{"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/media?parent=34"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/categories?post=34"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mx1mail.com\/blog\/wp-json\/wp\/v2\/tags?post=34"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}