From: Mail Delivery Subsystem <MAILER-DAEMON@mx1.meridiansupply.example>
To: Maya Chen <maya@brightside.example>
Subject: Delivery Status Notification (no status part) SAMPLE
Date: Mon, 16 Feb 2026 07:50:00 -0800
Message-ID: <p7-dsn-nostatus@mx1.meridiansupply.example>
Auto-Submitted: auto-replied
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status; boundary="=_p7_dsn_nostatus"

--=_p7_dsn_nostatus
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

Delivery to dana@nonexistent.example failed: 550 5.1.1 SAMPLE - no such user.
This report is deliberately incomplete: the machine-readable
message/delivery-status part that RFC 3464 requires is absent.
--=_p7_dsn_nostatus
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
--=_p7_dsn_nostatus--