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Subject: Mail delivery failed: returning message to sender
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Date: Mon, 10 Nov 2025 19:52:56 -0500
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This message was created automatically by mail delivery software.
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:
[email protected]
host gmail-smtp-in.l.google.com [74.125.21.26]
SMTP error from remote mail server after end of data:
550-5.7.26 Your email has been blocked because the sender is unauthenticated.
550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.
550-5.7.26
550-5.7.26 Authentication results:
550-5.7.26 DKIM = did not pass
550-5.7.26 SPF [host11.registrar-servers.com] with ip:
[198.54.126.135] = did
550-5.7.26 not pass
550-5.7.26
550-5.7.26 For instructions on setting up authentication, go to
550 5.7.26 https://support.google.com/mail/answer/81126#authentication 00721157ae682-787f7261d32si14844427b3.878 - gsmtp
--1762822376-eximdsn-516930020
Content-type: message/delivery-status
Reporting-MTA: dns; host11.registrar-servers.com
Action: failed
Final-Recipient: rfc822;[email protected]
Status: 5.0.0
Remote-MTA: dns; gmail-smtp-in.l.google.com
Diagnostic-Code: smtp; 550-5.7.26 Your email has been blocked because the sender is unauthenticated.
550-5.7.26 Gmail requires all senders to authenticate with either SPF or DKIM.
550-5.7.26
550-5.7.26 Authentication results:
550-5.7.26 DKIM = did not pass
550-5.7.26 SPF [host11.registrar-servers.com] with ip: [198.54.126.135] = did
550-5.7.26 not pass
550-5.7.26
550-5.7.26 For instructions on setting up authentication, go to
550 5.7.26 https://support.google.com/mail/answer/81126#authentication 00721157ae682-787f7261d32si14844427b3.878 - gsmtp
--1762822376-eximdsn-516930020
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To: [email protected]
Subject: =?us-ascii?Q?Sucuri_Alert,_www.robovet.com,_Post_Update,_64.?= =?us-ascii?Q?188.97.13?=
Date: Tue, 11 Nov 2025 00:52:53 +0000
From: WordPress <[email protected]>
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Event: Post Update
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Date/Time: November 11, 2025 12:52 am
User: admin (admin)
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