Subject: smime-one-part-complex-hp
From: Alice <[email-masked]>
To: Bob <[email-masked]>
Date: Sat, 20 Feb 2021 12:06:02 -0500

This is the
smime-one-part-complex-hp
message.

This is a signed-only S/MIME message via PKCS#7 signedData.  The
payload is a multipart/alternative message with an inline
image/png attachment. It uses the Header Protection scheme from
RFC 9788.

--
Alice
[email-masked]