Subject: Mail delivery failed: returning message to sender
From: "WEB.DE Mailer Daemon" <[email-masked]>
To: [email-masked]
Date: Mon, 20 Dec 2021 16:22:49 +0100

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of
its recipients. This is a permanent error.

The following address failed:

?[email-masked]:
SMTP error from remote server for RCPT TO command, host: mail.rastberger.ch (157.90.88.146) reason: 550 5.1.1 <?[email-masked]>: Recipient address rejected: User unknown
in virtual mailbox table

--- The header of the original message is following. ---

From: =?utf-8?q?Ana=20Cristina=20Mazzei-Sch=c3=bcller?= <[email-masked]>
Subject: =?utf-8?q?Termine=20f=c3=bcr=20den=20=c3=9cbungskurs=20Prophetie=202022?=
Date: Mon, 20 Dec 2021 15:22:43 +0000
Reply-To: =?utf-8?q?Ana=20Cristina=20Mazzei-Sch=c3=bcller?= <[email-masked]>