Subject: smime-signed-enc-complex-hp-shy-reply
From: Alice <[email-masked]>
To: Bob <[email-masked]>
Date: Sat, 20 Feb 2021 12:18:02 -0500

This is the
smime-signed-enc-complex-hp-shy-reply
message.

This is a signed-and-encrypted S/MIME message using PKCS#7
envelopedData around signedData.  The payload is a
multipart/alternative message with an inline image/png
attachment. It uses the Header Protection scheme from RFC 9788
with the `hcp_shy` Header Confidentiality Policy.

--
Alice
[email-masked]