Returned mail: see transcript for details

From: MAILER-DAEMON@mail.kbj.cz
Domain: IP info mail.kbj.cz
MX-server: IP info mail.ticketnew.com
Size: 328 Bytes
Create: 2024-06-11
Update: 2024-06-11
Score: 0
Safe: Yes

The original message was received at Mon, 10 Jun 2024 09:12:30 +0200 from mail.ticketnew.com [49.50.81.243] ----- The following addresses had permanent fatal errors ----- (reason: User unknown) ----- Transcript of session follows ----- 550 5.1.1 ... User unknown