{"id":3325,"date":"2015-08-14T15:34:31","date_gmt":"2015-08-14T07:34:31","guid":{"rendered":"http:\/\/www.alfredivy.per.sg\/blogger\/?p=3325"},"modified":"2015-12-22T10:42:47","modified_gmt":"2015-12-22T02:42:47","slug":"smtp-failure-multi-skilled-or-by-towers","status":"publish","type":"post","link":"https:\/\/www.alfredivy.sg\/blogger\/2015\/08\/smtp-failure-multi-skilled-or-by-towers\/","title":{"rendered":"SMTP failure, multi-skilled or by Towers"},"content":{"rendered":"<p>The UPS monitoring server goes through the firewall to reach the SMTP relay server. \u00a0After hardening, the test emails are not going out. \u00a0The server engineer was pulling his hair out because everything looks fine at his end. \u00a0There is simply dead air, there was no response from the monitoring server and no test email. \u00a0By right this would have been escalated to the SMTP team. \u00a0But they were doing UAT with the customer, so I took a look.<\/p>\n<p>Using my notebook to stand in as the UPS, my telnet to port 25 was unresponsive. \u00a0A quick check in the SMTP settings for hosts allowed to relay, IP address was not included. \u00a0Added a bunch in. \u00a0This time it went through. \u00a0Restore back the cabling, the UPS now reports authentication failure. \u00a0On a hunch, I checked the Authentication Settings. \u00a0Surprise, surprise. \u00a0It was set to Integrated Windows Authentication. \u00a0Highest available but that only works for Windows operating system. \u00a0Checked Basic Authentication and the test mails went through.<\/p>\n<p>By the book going by the towers would have taken another day.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The UPS monitoring server goes through the firewall to reach the SMTP relay server. \u00a0After hardening, the test emails are not going out. \u00a0The server engineer was pulling his hair out because everything looks fine at his end. \u00a0There is&hellip; <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,5,73,23],"tags":[],"class_list":["post-3325","post","type-post","status-publish","format-standard","hentry","category-exchange","category-it","category-windows","category-work"],"_links":{"self":[{"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/posts\/3325","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/comments?post=3325"}],"version-history":[{"count":3,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/posts\/3325\/revisions"}],"predecessor-version":[{"id":3749,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/posts\/3325\/revisions\/3749"}],"wp:attachment":[{"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/media?parent=3325"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/categories?post=3325"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alfredivy.sg\/blogger\/wp-json\/wp\/v2\/tags?post=3325"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}