Reporting-MTA: dns; fx408.security-mail.net
X-Postfix-Queue-ID: 6AC9432236B
X-Postfix-Sender: rfc822; xxxxxxxxxxxxxxxxxxxxxxxxxx@xxxxxx.xx
Arrival-Date: Mon, 21 Aug 2023 16:06:45 +0200 (CEST)

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