From: Mail Delivery Subsystem <mailer-daemon@example.net>
To: sender@example.com
Subject: Delivery temporarily delayed
Date: Tue, 02 Jun 2026 10:01:00 +0000
Message-ID: <soft-bounce@example.net>
Content-Type: text/plain; charset=utf-8

Delivery Status Notification.
Final-Recipient: rfc822; full@example.com
Action: delayed
Status: 4.2.2
Diagnostic-Code: smtp; 452 4.2.2 Mailbox full