To: recipient@testcertificates.gov
From: sender@testcertificates.gov
Subject: Valid Negative Serial Number Test14
MIME-Version: 1.0
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This is an S/MIME signed message

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This is a sample signed message.

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

[encoded data, 4550 characters]
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