Subject: Email with embedded message
From: Sender <[email-masked]>
To: <[email-masked]>
Date: Wed, 15 Jul 2020 19:48:41 +0100

Example outer message.

Subject: Embedded subject line with emoji ✨
From: "Embed sender" <[email-masked]>
To: <[email-masked]>

X-heävy-mëtal-ümlaut: yes
Date: Sun, 12 May 2024 17:34:29 +1000

Example embedded message, with UTF-8 headers.