Subject: Mail delivery failed: returning message to sender
From: "GMX Mailer Daemon" <[email-masked]>
To: [email-masked]
Date: Tue, 09 Jun 2020 14:35:30 +0200

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(es)
failed:

[email-masked]:
SMTP error from remote server for RCPT TO command, host: gmail-smtp-in.l.google.com (66.102.1.27) reason: 550-5.1.1 The email account that you tried to reach does not exist. Please
 try
550-5.1.1 double-checking the recipient's email address for typos or
550-5.1.1 unnecessary spaces. Learn more at
550 5.1.1  https://support.google.com/mail/?p=NoSuchUser f6si2517766wmc.21
9 - gsmtp

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

To: [email-masked]
From: Hocuri <[email-masked]>
Subject: test
Date: Tue, 9 Jun 2020 14:36:10 +0200