Subject: Mail delivery failed: returning message to sender
From: Mail Delivery System <[email-masked]>
To: [email-masked]
Date: Sat, 19 Apr 2025 01:32:36 -0400

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-masked]
    host gmail-smtp-in.l.google.com [142.250.102.27]
    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 [goldenbusiness.info] with ip:
    [185.61.137.173] = 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 a640c23a62f3a-acb6ee600a6si239682466b.501 - gsmtp

From: [email-masked]
To: [email-masked]
Date: Sat, 19 Apr 2025 01:32:35 -0400

Dear Sir
Please send the office add.

Regards