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550 permanent failure for one or more recipients

2017-09-20 1:03 pm EST

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We are seeing this more frequently when sending out emails. Here is what gets returned to us:

Reporting-MTA: dns;
Action: failed
Final-Recipient: rfc822;
Status: 5.0.0
Remote-MTA: dns;
Diagnostic-Code: smtp; 550 permanent failure for one or more recipients (

And this:

Return-path: <>
Received: from [] (port=54210 helo=XXXXXX)
by with esmtpa (Exim 4.89)
(envelope-from <>)
id 1duhJD-0004Z4-2F; Wed, 20 Sep 2017 08:53:08 -0700
From: <>
Cc: <>
Subject: XXXXXX PO#123456789
Date: Wed, 20 Sep 2017 11:53:11 -0400
Message-ID: <003001d33228$905497e0$b0fdc7a0$@com>
MIME-Version: 1.0
Content-Type: multipart/mixed;
X-Mailer: Microsoft Office Outlook 12.0
Thread-Index: AdMyKI/HTBV/K5u1SyCETbDHUFypdg==
Content-Language: en-us
X-Exim-DSN-Information: Due to administrative limits only headers are returned

We are not blacklisted nor are we listed on Barracuda for anything. Please help, it is become more of a nuisance.

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Best answer chosen by User


42,973 Points
2017-09-20 1:20 pm EST
Hello Eacochem,

Sorry for the problem with the 550 error with your outgoing emails. There several possible issues that may cause the 550 error, please see 550 This message was classified as SPAM and may not be delivered. Check that article to see if you meet any of the criteria. If you are unable to resolve the issue based on the information provided in that article, please contact the live technical support for further assistance.

If you have any further questions, please let us know.

Kindest regards,
Arnel C.

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Ok, I will contact live support. Thanks.
8 Points
2017-09-22 2:43 pm EST
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