{"id":782,"date":"2012-10-26T13:48:58","date_gmt":"2012-10-26T17:48:58","guid":{"rendered":"https:\/\/www.inmotionhosting.com\/support\/2012\/10\/26\/email-error-551\/"},"modified":"2021-08-16T23:31:21","modified_gmt":"2021-08-17T03:31:21","slug":"email-error-551","status":"publish","type":"post","link":"https:\/\/www.inmotionhosting.com\/support\/email\/email-error-551\/","title":{"rendered":"Email error 551"},"content":{"rendered":"

A\u00a0551 email error<\/strong>\u00a0is normally ecountered when there is an attempted delivery to a mail server that doesn’t handle mail for the specified recipient.<\/p>\n

You should receive a bounce-back message from the server with a variation of\u00a0email error 551<\/strong>\u00a0in the subject, and the body should contain your original message that you attempted to deliver.<\/p>\n

Example bounce-back message<\/h2>\n
\n

Return-path: <>
Envelope-to: sender@example.com<\/strong>
Delivery-date: Thu, 25 Oct 2012 11:19:59 -0700
Received: from mailnull by biz100.inmotionhosting.com with local (Exim 4.77)
id 1TRS2B-00033h-Fn
for sender@example.com<\/strong>; Thu, 25 Oct 2012 11:19:59 -0700
X-Failed-Recipients: recipient@RemoteDomain.com<\/strong>
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@biz100.inmotionhosting.com>
To: sender@example.com<\/strong>
Subject: Mail delivery failed: returning message to sender<\/a>
Message-Id: <E1TRS2B-00033h-Fn@biz100.inmotionhosting.com>
Date: Thu, 25 Oct 2012 11:19:59 -0700<\/p>\n

This message was created automatically by mail delivery software.<\/div>\n
A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:<\/div>\n
\u00a0<\/div>\n
recipient@RemoteDomain.com<\/strong>
SMTP error from remote mail server after RCPT TO:<recipient@RemoteDomain.com<\/strong>>:
host RemoteDomain.com [123.123.123.123]:
551 not our customer<\/strong><\/div>\n
\u00a0<\/div>\n
—— This is a copy of the message, including all the headers. ——<\/div>\n
\u00a0<\/div>\n
Return-path: <sender@example.com<\/strong>>
Received: from bell.ca ([123.123.123]:42593 helo=Admin)
by biz100.inmotionhosting.com with esmtpa (Exim 4.77)
(envelope-from <sender@example.com<\/strong>>)
id 1TRS1q-0002fq-S4; Thu, 25 Oct 2012 11:19:39 -0700
Date: Fri, 26 Oct 2012 00:03:21 +0600
From: Sender <sender@example.com<\/strong>>
MIME-Version: 1.0
To: <recipient@RemoteDomain.com<\/strong>>
Subject: Meeting proposal<\/div>\n<\/p><\/div>\n

Common variations of the 551 email error<\/h2>\n