From: Alice Sender <alice@example.com>
To: Bob Recipient <bob@example.org>
Subject: Test message 008 - MIME multipart
Date: Thu, 01 Jan 2026 12:00:00 +0000
Message-ID: <test-008@example.com>
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="boundary-008"

This is the preamble, which is not part of the signed body.
--boundary-008
Content-Type: text/plain; charset=utf-8

This is the plain text part.
It has two lines.
--boundary-008
Content-Type: text/html; charset=utf-8

<html><body><p>This is the <b>HTML</b> part.</p></body></html>
--boundary-008--
