To: recipient@testcertificates.gov
From: sender@testcertificates.gov
Subject: Valid Unknown Not Critical Certificate Extension Test1
MIME-Version: 1.0
Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg="sha-256"; boundary="----862324BD6AC3EB124D1B424382633270"

This is an S/MIME signed message

------862324BD6AC3EB124D1B424382633270
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This is a sample signed message.

------862324BD6AC3EB124D1B424382633270
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------862324BD6AC3EB124D1B424382633270--

