{"id":29,"date":"2010-02-19T04:34:48","date_gmt":"2010-02-19T04:34:48","guid":{"rendered":"http:\/\/sherinsunny.wordpress.com\/?p=29"},"modified":"2010-02-19T04:34:48","modified_gmt":"2010-02-19T04:34:48","slug":"smtp-error-from-remote-mail-server-after-rcpt-to-host-mail-rebushr-com-194-73-102-244-550-rule-imposed-as-1102520qozz-com-is-believed-to-be-an-open-relay","status":"publish","type":"post","link":"https:\/\/linuxmaster.in\/?p=29","title":{"rendered":"SMTP error from remote mail server after RCPT TO:: host mail.rebushr.com [194.73.102.244]: 550 Rule imposed as 1102520@qozz.com is believed to be an open relay"},"content":{"rendered":"<p style=\"text-align:center;\"><strong>It&#8217;s not an open relay.<\/p>\n<p>a) qozz.com should set their rejections to FAIL, not blackhole. Blachole fails silently and may &#8220;fail&#8221; poorly written relay tests since it won&#8217;t outright reject the mail (but it also won&#8217;t deliver it).<\/p>\n<p>root@server442 [~]# cat \/etc\/valiases\/qozz.com<br \/>\n*: :blackhole:<\/p>\n<p>Instead they should set:<\/p>\n<p>*: :fail: No such user here<\/p>\n<p>Blackhole appears to be the default for most domains on this server. I recommend switching them all to fail if you are being marked as an open relay.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It&#8217;s not an open relay. a) qozz.com should set their rejections to FAIL, not blackhole. Blachole fails silently and may &#8220;fail&#8221; poorly written relay tests since it won&#8217;t outright reject the mail (but it also won&#8217;t deliver it). root@server442 [~]# cat \/etc\/valiases\/qozz.com *: :blackhole: Instead they should set: *: :fail: No such user here Blackhole &hellip; <a href=\"https:\/\/linuxmaster.in\/?p=29\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;SMTP error from remote mail server after RCPT TO:: host mail.rebushr.com [194.73.102.244]: 550 Rule imposed as 1102520@qozz.com is believed to be an open relay&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-29","post","type-post","status-publish","format-standard","hentry","category-linux-and-unix"],"_links":{"self":[{"href":"https:\/\/linuxmaster.in\/index.php?rest_route=\/wp\/v2\/posts\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/linuxmaster.in\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/linuxmaster.in\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/linuxmaster.in\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/linuxmaster.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=29"}],"version-history":[{"count":0,"href":"https:\/\/linuxmaster.in\/index.php?rest_route=\/wp\/v2\/posts\/29\/revisions"}],"wp:attachment":[{"href":"https:\/\/linuxmaster.in\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=29"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/linuxmaster.in\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=29"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/linuxmaster.in\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}