{"id":5282,"date":"2021-10-28T06:06:12","date_gmt":"2021-10-28T06:06:12","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=5282"},"modified":"2022-08-26T22:33:32","modified_gmt":"2022-08-26T22:33:32","slug":"mimecast-sending-from-another-tenants-domain","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/mimecast-sending-from-another-tenants-domain","title":{"rendered":"Mimecast sending from another Tenants Domain"},"content":{"rendered":"<p>Mimecast will actually let you send from another domain you do not own ( will need to open a Support ticket and give a business reason )\u00a0<\/p><p><br \/><b>Mimecast Production IP ranges (This IP range when you have a registered internal domain)<\/b><br \/>include:au._netblocks.<a href=\"https:\/\/protect-au.mimecast.com\/s\/FCu-Cvl0NzIG1omhoyjMi?domain=mimecast.com\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\" data-linkindex=\"0\">mimecast.com<\/a><br \/><br \/><b>Mimecast Non-Production IP Ranges (This IP range is used for non-internal domains)<\/b><br \/>include:au._extnetblocks.<a href=\"https:\/\/protect-au.mimecast.com\/s\/FCu-Cvl0NzIG1omhoyjMi?domain=mimecast.com\/\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\" data-linkindex=\"1\">mimecast.com<\/a><br \/><br \/>If customers wish to impersonate a domain you do not own, for example with address rewriting, use the DNS Authorization Code found in\u00a0<a href=\"https:\/\/protect-au.mimecast.com\/s\/a-VoCwVLOAF76XMI8XLVs?domain=community.mimecast.com\" target=\"_blank\" rel=\"noopener noreferrer\" data-auth=\"NotApplicable\" data-linkindex=\"2\">Your Mimecast Account Settings<\/a>. The Mimecast Secure Email Gateway checks messages that are sent from each account. If the sending domain doesn&#8217;t match a domain listed as internal to the account, it will then check the TXT record of the sending domain for the presence of the DNS Authorization Code. If this code isn&#8217;t present, messages will be sent using these IP blocks instead of the normal route.<br \/><br \/><br \/><\/p><p><a href=\"https:\/\/community.mimecast.com\/s\/article\/Connect-Application-Implementing-SPF-for-Outbound-Email-Delivery-731048977\">https:\/\/community.mimecast.com\/s\/article\/Connect-Application-Implementing-SPF-for-Outbound-Email-Delivery-731048977<\/a><\/p><p>&nbsp;<\/p><p>You can also tighten down SPF to only allow specific email address to send from third party services instead of whole domain : <a href=\"https:\/\/www.jamieweb.net\/blog\/using-spf-macros-to-solve-the-operational-challenges-of-spf\/\">https:\/\/www.jamieweb.net\/blog\/using-spf-macros-to-solve-the-operational-challenges-of-spf\/<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Mimecast will actually let you send from another domain you do not own ( will need to open a Support ticket and give a business reason )\u00a0Mimecast [&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":[3629,2871,1797,1224],"class_list":["post-5282","post","type-post","status-publish","format-standard","hentry","category-research","tag-blocks","tag-external","tag-mimecast","tag-spf"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/5282","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=5282"}],"version-history":[{"count":3,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/5282\/revisions"}],"predecessor-version":[{"id":6058,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/5282\/revisions\/6058"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=5282"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=5282"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=5282"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}