Envelope-to: ffprestadoracom@wh01.nocti.net.br
Delivery-date: Mon, 26 Jan 2026 13:21:31 -0300
Auto-Submitted: auto-replied
From: Mail Delivery System <Mailer-Daemon@wh01.nocti.net.br>
To: ffprestadoracom@wh01.nocti.net.br
References: <E1vkPLG-000000006tN-0948@wh01.nocti.net.br>
Content-Type: multipart/report; report-type=delivery-status; boundary=1769444491-eximdsn-610260428
MIME-Version: 1.0
Subject: Mail delivery failed: returning message to sender
Message-Id: <E1vkPLH-000000006to-3qeo@wh01.nocti.net.br>
Date: Mon, 26 Jan 2026 13:21:31 -0300

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Content-type: text/plain; charset=us-ascii

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:

alvi70341@gmail.com
    host gmail-smtp-in.l.google.com [108.177.123.26]
    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 [wh01.nocti.net.br] with ip: [177.91.172.6] = did 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 5a478bee46e88-2b73a4ba0c0si27548223eec.7 - gsmtp

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Content-type: message/delivery-status

Reporting-MTA: dns; wh01.nocti.net.br

Action: failed
Final-Recipient: rfc822;alvi70341@gmail.com
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 [wh01.nocti.net.br] with ip: [177.91.172.6] = did 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 5a478bee46e88-2b73a4ba0c0si27548223eec.7 - gsmtp

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Content-type: message/rfc822

To: alvi70341@gmail.com
Subject: Working fine 5660243
From: Cpanel #5660243 <sender@ffprestadora.com.br>
Reply-To: sender@ffprestadora.com.br
Message-Id: <E1vkPLG-000000006tN-0948@wh01.nocti.net.br>
Date: Mon, 26 Jan 2026 13:21:30 -0300

You have tested the item #5660243

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