Subject: Undelivered Mail Returned to Sender
From: <[email-masked]> (Mail Delivery System)
To: [email-masked]
Date: Thu, 27 Oct 2022 04:45:40 +0200

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to <[email-masked]>.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

<[email-masked]>: 550 [email-masked]... No such user