{"id":1227,"date":"2021-06-10T04:36:08","date_gmt":"2021-06-10T04:36:08","guid":{"rendered":"https:\/\/prodmarc.com\/knowledge\/?p=1227"},"modified":"2023-01-31T07:34:08","modified_gmt":"2023-01-31T07:34:08","slug":"arc-headers","status":"publish","type":"post","link":"https:\/\/knowledge.progist.net\/index.php\/2021\/06\/10\/arc-headers\/","title":{"rendered":"ARC Headers"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1227\" class=\"elementor elementor-1227\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-edc2332 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"edc2332\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-d7c9dc3\" data-id=\"d7c9dc3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f8fb038 elementor-widget elementor-widget-text-editor\" data-id=\"f8fb038\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><b>What is ARC<\/b>?<\/p><p>\u00a0ARC helps to preserve email authentication results and verifies the identity of email intermediaries that forward a message on to its final destination. There are three key components to ARC:\u00a0<\/p><ol style=\"font-weight: 400;\"><li>ARC Authentication Results header:\u00a0a header containing email authentication results like SPF, DKIM, and DMARC<\/li><li>ARC Signature:\u00a0a DKIM-like signature that takes a snapshot of the message header information, including the to, from, subject, and body<\/li><li>ARC Seal: another DKIM-like signature that includes the ARC Signature and the ARC Authentication Results header information.<\/li><\/ol><p>To read more about Authenticated Received Chain(ARC) please refer to the below link:<\/p><p><a href=\"https:\/\/knowledge.progist.net\/index.php\/2021\/05\/19\/authenticated-received-chain\/\" target=\"_blank\" rel=\"noopener\">https:\/\/knowledge.progist.net\/index.php\/2021\/05\/19\/authenticated-received-chain\/<\/a><\/p><div class=\"wDYxhc\" lang=\"en-IN\" data-md=\"83\"><div class=\"di3YZe\"><h3 class=\"co8aDb XcVN5d\" role=\"heading\" aria-level=\"3\">ARC headers:<\/h3><div class=\"RqBzHd\"><ul class=\"i8Z77e\"><li class=\"TrT0Xe\"><strong>ARC-Authentication-Results (AAR)\u00a0header:<\/strong> records the contents of the Authentication-Results\u00a0header from DMARC. The purpose of these header is to check whether any previous authentication passed or failed.<\/li><li class=\"TrT0Xe\"><strong>ARC-Message-Signature (AMS)\u00a0header:<\/strong> includes a cryptographic signature of the message itself up to this point.<\/li><li class=\"TrT0Xe\"><strong>ARC-Seal (AS)\u00a0header:<\/strong> includes a cryptographic signature of the message\u00a0headers.<\/li><\/ul><p><img decoding=\"async\" src=\"https:\/\/downloads.intercomcdn.com\/i\/o\/39468729\/cdb49423fe6ca68bafaeb4a1\/Screen+Shot+2017-11-14+at+17.26.55.png\" \/><\/p><div class=\"u9iNfb\"><div class=\"content content__narrow\"><div class=\"article intercom-force-break\"><article dir=\"ltr\"><p class=\"intercom-align-left\">All of the above explained headers together are called an ARC set. Multiple ARC sets &#8211; if present &#8211; represent an ARC chain. Each of the headers within an ARC set contains a tag \u201ci=\u201d which represents the sequence number starting from 1 and it is the same for each ARC header within a set.\u00a0<\/p><\/article><\/div><\/div><div class=\"intercom-reaction-picker\" dir=\"ltr\">\u00a0<\/div><\/div><\/div><\/div><\/div><div class=\"g\"><div data-hveid=\"CAMQAA\" data-ved=\"2ahUKEwiV3fzKnIzxAhUuILcAHbEfAWAQFSgAMAF6BAgDEAA\"><div class=\"tF2Cxc\">\u00a0<\/div><\/div><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What is ARC? \u00a0ARC helps to preserve email authentication results and verifies the identity of email intermediaries that forward a message on to its final destination. There are three key<\/p>\n<p><a href=\"https:\/\/knowledge.progist.net\/index.php\/2021\/06\/10\/arc-headers\/\" class=\"more-link\">Continue Reading<span class=\"screen-reader-text\">ARC Headers<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_eb_attr":"","om_disable_all_campaigns":false,"footnotes":""},"categories":[3],"tags":[24,25,56],"class_list":["post-1227","post","type-post","status-publish","format-standard","hentry","category-arc","tag-arc","tag-arc-headers","tag-dmarc"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/posts\/1227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/comments?post=1227"}],"version-history":[{"count":5,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/posts\/1227\/revisions"}],"predecessor-version":[{"id":3010,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/posts\/1227\/revisions\/3010"}],"wp:attachment":[{"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/media?parent=1227"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/categories?post=1227"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/knowledge.progist.net\/index.php\/wp-json\/wp\/v2\/tags?post=1227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}