{"id":4152,"date":"2026-06-08T18:00:50","date_gmt":"2026-06-08T15:00:50","guid":{"rendered":"https:\/\/support.withsecure.com\/en\/?post_type=support_article&#038;p=4152"},"modified":"2026-06-08T18:00:50","modified_gmt":"2026-06-08T15:00:50","slug":"msg-is-blocking-emails-due-to-blacklisted-ip","status":"publish","type":"support_article","link":"https:\/\/support.withsecure.com\/fi\/support-articles\/msg-is-blocking-emails-due-to-blacklisted-ip\/","title":{"rendered":"MSG is blocking emails due to blacklisted IP"},"content":{"rendered":"<h3>Issue:<\/h3>\n<p>Trying to send emails through MSG results in the following Non-Delivery Report (NDR) message:<br \/>SMTP Protocol Returned a Permanent Error 550 5.7.0 Blocked &#8211; see https:\/\/ipcheck.proofpoint.com\/?ip=&lt;ip.address.goes.here&gt;<\/p>\n<h3>Resolution:<\/h3>\n<p>The sending IP-address has been blocked by Proofpoint Dynamic Reputation (PDR). This can be double-checked by visiting the page\u00a0<a href=\"https:\/\/ipcheck.proofpoint.com\" target=\"_blank\" rel=\"noopener\">https:\/\/ipcheck.proofpoint.com<\/a><br \/>The section\u00a0<i>About Proofpoint\u00ae Dynamic Reputation (PDR)\u00a0<\/i>contains more information about the function as well as a link to an FAQ-page with common questions and answers, for example what to do to prevent this from happening.<\/p>\n<p>To get the situation investigated quicker, open a support ticket with F-Secure. Include the IP that is blocked and information about how long the situation has been ongoing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When trying to send email, I receive ndr email with following details:<br \/>\nRemote Server returned &#8217;< #5.5.0 SMTP; 554 Blocked - see https:\/\/support.proofpoint.com\/dnsbl-lookup.cgi?ip=xx.xx.xx.xx>&#8217;<\/p>\n","protected":false},"template":"","support_article_product":[106],"class_list":["post-4152","support_article","type-support_article","status-publish","hentry"],"acf":{"source_foreign_id":"000005647","source_version":3,"source_system":"salesforce","source_date_updated":"2026-06-08 15:00:50","import_hash":"d0ad4f72f96eddef0fcb2c5fbba49896a670fc67","vanilla_article_id":31168,"vanilla_url":"https:\/\/community.withsecure.com\/en\/kb\/articles\/31168-msg-is-blocking-emails-due-to-blacklisted-ip","vanilla_kb_id":30,"vanilla_category_id":103,"machine_translated":false,"reactions_helpful_yes":0,"reactions_helpful_no":0},"_links":{"self":[{"href":"https:\/\/support.withsecure.com\/fi\/wp-json\/wp\/v2\/support_article\/4152","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/support.withsecure.com\/fi\/wp-json\/wp\/v2\/support_article"}],"about":[{"href":"https:\/\/support.withsecure.com\/fi\/wp-json\/wp\/v2\/types\/support_article"}],"wp:attachment":[{"href":"https:\/\/support.withsecure.com\/fi\/wp-json\/wp\/v2\/media?parent=4152"}],"wp:term":[{"taxonomy":"support_article_product","embeddable":true,"href":"https:\/\/support.withsecure.com\/fi\/wp-json\/wp\/v2\/support_article_product?post=4152"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}