From: Mail Delivery Subsystem <MAILER-DAEMON@mx1.meridiansupply.example>
To: Maya Chen <maya@brightside.example>
Subject: Delivery Status Notification (failure, headers only) SAMPLE
Date: Mon, 16 Feb 2026 07:48:00 -0800
Message-ID: <p7-dsn-hdrs@mx1.meridiansupply.example>
Auto-Submitted: auto-replied
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status; boundary="=_p7_dsn_p7-dsn-hdrs"

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Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

Your message could not be delivered. Only its headers are returned.
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Content-Type: message/delivery-status

Reporting-MTA: dns; mx1.meridiansupply.example
Arrival-Date: Mon, 16 Feb 2026 07:45:12 -0800

Final-Recipient: rfc822; dana@nonexistent.example
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; 550 5.1.1 SAMPLE - no such user
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Content-Type: text/rfc822-headers

From: Maya Chen <maya@brightside.example>
To: Sam Rivera <sam@meridiansupply.example>
Subject: Standing order for Q1 (SAMPLE)
Date: Mon, 16 Feb 2026 07:45:00 -0800
Message-ID: <p7-dsn-original@brightside.example>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
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