{"id":1477,"date":"2015-02-23T23:58:21","date_gmt":"2015-02-23T23:58:21","guid":{"rendered":"http:\/\/pariswells.com\/blog\/?p=1477"},"modified":"2016-10-06T17:50:40","modified_gmt":"2016-10-06T17:50:40","slug":"ndr-email-bouncing-from-barracudanetworks-spam-filter-with-550-message","status":"publish","type":"post","link":"https:\/\/pariswells.com\/blog\/random\/ndr-email-bouncing-from-barracudanetworks-spam-filter-with-550-message","title":{"rendered":"NDR Email Bouncing from barracudanetworks spam filter with 550 Message"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\" size-thumbnail wp-image-1478 alignleft img-responsive\" src=\"http:\/\/pariswells.com\/blog\/wp-content\/uploads\/2015\/02\/Barracuda_Networks1-150x150.png\" alt=\"Barracuda_Networks[1]\" width=\"150\" height=\"150\" \/>We received an\u00a0NDR recently from barracuda networks spam filter with a 550 error code. It also came back with the SMTP address we were trying to send to as well as :blocked at the end. E.g.<\/p><pre class=\"prettyprint lang-auto linenums:0 prettyprinted\"><span class=\"typ\">Final<\/span><span class=\"pun\">-<\/span><span class=\"typ\">Recipient<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> rfc822<\/span><span class=\"pun\">;<\/span><span class=\"pln\"> your@email<\/span><span class=\"pun\">.<\/span><span class=\"pln\">com\r\n<\/span><span class=\"typ\">Action<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> failed\r\n<\/span><span class=\"typ\">Status<\/span><span class=\"pun\">:<\/span> <span class=\"lit\">5.0<\/span><span class=\"pun\">.<\/span><span class=\"lit\">0<\/span>\r\n<span class=\"typ\">Remote<\/span><span class=\"pun\">-<\/span><span class=\"pln\">MTA<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> dns<\/span><span class=\"pun\">;<\/span><span class=\"pln\"> d9590b<\/span><span class=\"pun\">.<\/span><span class=\"pln\">ess<\/span><span class=\"pun\">.<\/span><span class=\"pln\">barracudanetworks<\/span><span class=\"pun\">.<\/span><span class=\"pln\">com\r\n<\/span><span class=\"typ\">Diagnostic<\/span><span class=\"pun\">-<\/span><span class=\"typ\">Code<\/span><span class=\"pun\">:<\/span><span class=\"pln\"> smtp<\/span><span class=\"pun\">;<\/span> <span class=\"lit\">550<\/span><span class=\"pln\"> permanent failure <\/span><span class=\"kwd\">for<\/span><span class=\"pln\"> one <\/span><span class=\"kwd\">or<\/span><span class=\"pln\"> more recipients\r\n    <\/span><span class=\"pun\">(<\/span><span class=\"pln\">your@email<\/span><span class=\"pun\">.<\/span><span class=\"pln\">com<\/span><span class=\"pun\">:<\/span><span class=\"pln\">blocked<\/span><span class=\"pun\">)\r\n\r\n<\/span>I tried all the basics making sure our IP had not been blacklisted : \r\nhttp:\/\/www.barracudacentral.org\/reputation which it had not. I tried \r\ntelneting to one of the SMTP servers to view the error, however this \r\nproduced a malformed 550 error so not a good test.\r\n\r\nUpon liaising with the postmaster at the receiving end, turns out the email had a domain name \r\nin the body which was on their Intent Database :\r\n <a href=\"https:\/\/techlib.barracuda.com\/display\/bessv10\/intent+analysis+-+inbound+mail\">https:\/\/techlib.barracuda.com\/display\/bessv10\/intent+analysis+-+inbound+mail<\/a> which is why it \r\ngot blocked. Make sure you check your email for domain names if you get these.<\/pre><p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>We received an\u00a0NDR recently from barracuda networks spam filter with a 550 error code. It also came back with the SMTP address we were trying to send [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[917,918,915,919,916],"class_list":["post-1477","post","type-post","status-publish","format-standard","hentry","category-random","tag-blocked","tag-550-smtp","tag-barracudanetworks","tag-permanent-failure","tag-spam"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/1477","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=1477"}],"version-history":[{"count":5,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/1477\/revisions"}],"predecessor-version":[{"id":2228,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/posts\/1477\/revisions\/2228"}],"wp:attachment":[{"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/media?parent=1477"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/categories?post=1477"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pariswells.com\/blog\/wp-json\/wp\/v2\/tags?post=1477"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}