To: test@example.com
From: test@example.com
Subject: test
MIME-Version: 1.0
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha-256"; boundary="----1ED1FE1360F0B640109B0A3D6A64EFEC"

This is an S/MIME signed message

------1ED1FE1360F0B640109B0A3D6A64EFEC
Date: Wed, 20 Feb 2019 00:00:57 +0100
From: test@example.com
Subject: test
MIME-Version: 1.0
Content-Disposition: inline
Content-Type: text/plain

test

------1ED1FE1360F0B640109B0A3D6A64EFEC
Content-Type: application/pkcs7-signature; name="smime.p7s"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="smime.p7s"
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------1ED1FE1360F0B640109B0A3D6A64EFEC--