Reporting-MTA: dns; fx303.security-mail.net
X-Postfix-Queue-ID: 96EBD30FC27
X-Postfix-Sender: rfc822; xxxxxxxxxxxxxxxxxxxxxxxxxxx@xxxxxx.xx
Arrival-Date: Thu,  1 Jun 2023 11:55:05 +0200 (CEST)

Final-Recipient: rfc822; xxxxxx@xxxxxxxxxxxxx.xx
Original-Recipient: rfc822;xxxxxx@xxxxxxxxxxxxx.xx
Action: failed
Status: 5.0.0
Remote-MTA: dns; mails.security-mail.net
Diagnostic-Code: smtp; 550 xxxxxx@xxxxxxxxxxxxx.xx unknown user account