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

This is the
smime-multipart-complex
message.

This is a signed-only S/MIME message via PKCS#7 detached
signature (multipart/signed).  The payload is a
multipart/alternative message with an inline image/png
attachment. It uses no Header Protection.

--
Alice
[email-masked]