dennis562 Posted March 6, 2019 Share Posted March 6, 2019 I'm seeing this error for all recipients on a particular domain: "spamcop.mimecast.org Blocked - see https://www.spamcop.net/bl.shtml?198.61.254.91. - https://community.mimecast.com/docs/DOC-1369#550 [bEjCcA39P3SxsOV3CZ9qSw.us331]" However, as you can see here, that IP is not on the blacklist: https://www.spamcop.net/w3m?action=blcheck&ip=198.61.254.91. Here's a link to the message and headers: https://www.mail-tester.com/test-iyn5n@mail-tester.com Quote Link to comment Share on other sites More sharing options...
petzl Posted March 7, 2019 Share Posted March 7, 2019 (edited) 19 hours ago, dennis562 said: I'm seeing this error for all recipients on a particular domain: "spamcop.mimecast.org Blocked - see https://www.spamcop.net/bl.shtml?198.61.254.91. - https://community.mimecast.com/docs/DOC-1369#550 [bEjCcA39P3SxsOV3CZ9qSw.us331]" However, as you can see here, that IP is not on the blacklist: https://www.spamcop.net/w3m?action=blcheck&ip=198.61.254.91. Here's a link to the message and headers: https://www.mail-tester.com/test-iyn5n@mail-tester.com Never been on the SpamCop blacklist. who is stating it is? Sometimes a "clever Trevor" have a blocklist working in reverse? Or it could be a fake bounce from someone you are mailing too? Edited March 7, 2019 by petzl Quote Link to comment Share on other sites More sharing options...
dennis562 Posted March 7, 2019 Author Share Posted March 7, 2019 Thank you for your quick reply! Quote who is stating it is? The email admin at the company is saying that no one at their company is receiving our email newsletter — I confirmed it in our error logs (see attached). Quote Sometimes a "clever Trevor" have a blocklist working in reverse?Or it could be a fake bounce from someone you are mailing too? I'm not sure what you mean by this. Quote Link to comment Share on other sites More sharing options...
petzl Posted March 7, 2019 Share Posted March 7, 2019 (edited) 19 minutes ago, dennis562 said: I'm not sure what you mean by this. Fake bounce can be set up on most email clients even Gmail can do it You need a copy of headers to find out who is bouncing and contact their abuse deskThe IP you stated has never been listed by SpamCop in the last 90 days. A badly set-up email server can be set-up to bounce emails NOT listed on SpamCop. As SpamCop only lists for 24 hours after last spam, some set-up "unable to deliver" in the hope the spam stops when it retries. Advice is always free till you act on it. I'm a member not admin Edited March 7, 2019 by petzl Quote Link to comment Share on other sites More sharing options...
gnarlymarley Posted April 24, 2019 Share Posted April 24, 2019 On 3/6/2019 at 4:58 PM, dennis562 said: spamcop.mimecast.org Blocked - see https://www.spamcop.net/bl.shtml?198.61.254.91. - https://community.mimecast.com/docs/DOC-1369#550 [bEjCcA39P3SxsOV3CZ9qSw.us331]" Looks like mimecast may have setup their own blacklist. On 3/6/2019 at 5:11 PM, petzl said: Or it could be a fake bounce from someone you are mailing too? dennis562, When I first looked at adding a blacklist to my MTA about twenty years ago, I had to key in the deny message into mailer configuration file. As you can see from this link (https://www.spamcop.net/fom-serve/cache/294.html), anyone can put anything they want into that message. This is what petzl means about a fake bounce. Quote Link to comment Share on other sites More sharing options...
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