MIME-Version: 1.0
Date: Mon, 26 Jan 2026 14:38:03 +0000
From: Alice@example.com
To: test-list@example.com
Subject: [test-list] clear-signed sig.SHA256 wrapped in multipart/mixed
Content-Type: multipart/mixed; boundary="============MIXEDBOUNDARY=="

--============MIXEDBOUNDARY==
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Content-Description: Mailing list header

Welcome to the test-list mailing list.

--============MIXEDBOUNDARY==
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="------------ms030903020902020502030404"

This is a cryptographically signed message in MIME format.

--------------ms030903020902020502030404
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: quoted-printable
Content-Language: en-US

This is a test message from Alice to Bob.

--------------ms030903020902020502030404
Content-Type: application/pkcs7-signature; name=smime.p7s
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename=smime.p7s
Content-Description: S/MIME Cryptographic Signature

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--------------ms030903020902020502030404--

--============MIXEDBOUNDARY==
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Content-Description: Mailing list footer

test-list mailing list -- test-list@example.com

--============MIXEDBOUNDARY==--