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Date: Wed, 12 Aug 2026 22:51:14 +0700 (+07)
From: MAILER-DAEMON@rl-mx-gw-shost-han1.tenten.vn (Mail Delivery System)
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<maugiaodien.com@gmail.com>: host gmail-smtp-in.l.google.com[142.251.170.27]
    said: 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 [ng-shost103.tenten.vn]
    with ip: [150.95.116.142] = 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
    d2e1a72fcca58-84fb1f1edfasi4949485b3a.155 - gsmtp (in reply to end of DATA
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Arrival-Date: Wed, 12 Aug 2026 22:51:12 +0700 (+07)

Final-Recipient: rfc822; maugiaodien.com@gmail.com
Original-Recipient: rfc822;maugiaodien.com@gmail.com
Action: failed
Status: 5.7.26
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
    [ng-shost103.tenten.vn] with ip: [150.95.116.142] = 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
    d2e1a72fcca58-84fb1f1edfasi4949485b3a.155 - gsmtp

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Date: Wed, 12 Aug 2026 15:51:10 +0000
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