{"id":4140,"date":"2019-05-16T04:18:40","date_gmt":"2019-05-16T04:18:40","guid":{"rendered":"https:\/\/pariswells.com\/blog\/?p=4140"},"modified":"2019-05-16T04:18:40","modified_gmt":"2019-05-16T04:18:40","slug":"office-365-failed-550-5-4-316-message-expired-connection-refusedsocket-error-code-10061","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/research\/office-365-failed-550-5-4-316-message-expired-connection-refusedsocket-error-code-10061","title":{"rendered":"Office 365 Failed : 550 5.4.316 Message expired, connection refused(Socket error code 10061)"},"content":{"rendered":"<p>Recently a few users had the following bounce backs from Office 365 to an On-Prem Mailserver with the error<\/p><p><strong>&#8216;550 5.4.316 Message expired, connection refused(Socket error code 10061)<\/strong><\/p><p>Checking the logs in 365 of this, this was due to the Fortigate adding some 365 SMTP servers to the IPS Quantarine List<\/p><p>Removing these servers from the Quarantine and also removing IPS checking in the Policy of 365 servers to on-prem via SMTP resolved this<\/p>","protected":false},"excerpt":{"rendered":"<p>Recently a few users had the following bounce backs from Office 365 to an On-Prem Mailserver with the error&#8216;550 5.4.316 Message expired, connection refused(Socket error code 10061)Checking [&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":[1206,2967,1251,1250,622,2968,2966,623],"class_list":["post-4140","post","type-post","status-publish","format-standard","hentry","category-research","tag-1206","tag-bounce-back","tag-fortigate","tag-fortinet","tag-imanage","tag-ndr","tag-socket-error-code-10061","tag-worksite"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4140","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=4140"}],"version-history":[{"count":1,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4140\/revisions"}],"predecessor-version":[{"id":4141,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/4140\/revisions\/4141"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=4140"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=4140"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=4140"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}