{"id":4580,"date":"2020-04-28T05:50:58","date_gmt":"2020-04-28T05:50:58","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=4580"},"modified":"2020-04-28T05:50:58","modified_gmt":"2020-04-28T05:50:58","slug":"valimail-mostly-failing-forwarders","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/valimail-mostly-failing-forwarders","title":{"rendered":"Valimail &#8211; Mostly failing forwarders"},"content":{"rendered":"<p>Sender Rewriting Scheme (SRS) functionality was added to Office 365 ( and other platforms ) to resolve a problem in which autoforwarding is incompatible with SPF.<\/p><p>SRS rewriting does not fix the issue of DMARC passing for forwarded messages. Although an SPF check will now pass by using a rewritten\u00a0<strong>P1 From<\/strong>\u00a0address, DMARC also requires an alignment check for the message to pass. For forwarded messages, DKIM always fails because\u00a0the signed DKIM domain does not match the\u00a0<strong>From<\/strong>\u00a0header domain. If an original sender sets their DMARC policy to reject forwarded messages, the forwarded messages are rejected by Message Transfer Agents (MTAs) that honor DMARC policies.<\/p><p>&nbsp;<\/p><p>So if you are forwarding emails , you can set SPF to Hard Fail , but DMARC you will not be able to fail due to DKIM<\/p>","protected":false},"excerpt":{"rendered":"<p>Sender Rewriting Scheme (SRS) functionality was added to Office 365 ( and other platforms ) to resolve a problem in which autoforwarding is incompatible with SPF.SRS rewriting [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1222,1223,3221,1224,3222,3220],"class_list":["post-4580","post","type-post","status-publish","format-standard","hentry","category-research","tag-dkim","tag-dmarc","tag-mostly-failing-forwarders","tag-spf","tag-srs","tag-valimail"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4580","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/comments?post=4580"}],"version-history":[{"count":1,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4580\/revisions"}],"predecessor-version":[{"id":4581,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4580\/revisions\/4581"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=4580"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=4580"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=4580"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}