From: Mailer-Daemon <postmaster@mail.sample.example>
To: Alex SAMPLE <alex@brightside.example>
Subject: Delivery Status Notification (failed) SAMPLE
Date: Tue, 21 Jan 2026 08:00:00 -0800
Message-ID: <dsn-01@mail.sample.example>
MIME-Version: 1.0
Content-Type: multipart/report; report-type=delivery-status; boundary="=_wg_dsn_01"

--=_wg_dsn_01
Content-Type: text/plain; charset=utf-8

Your message to sam@meridiansupply.example: failed.
--=_wg_dsn_01
Content-Type: message/delivery-status

Reporting-MTA: dns; mail.sample.example

Final-Recipient: rfc822; sam@meridiansupply.example
Action: failed
Status: 5.1.1
Diagnostic-Code: smtp; SAMPLE diagnostic
--=_wg_dsn_01
Content-Type: message/rfc822

From: Alex SAMPLE <alex@brightside.example>
To: Sam Rivera <sam@meridiansupply.example>
Subject: Original SAMPLE
Message-ID: <orig-dsn-01@brightside.example>

Original SAMPLE message body.
--=_wg_dsn_01--