The original message was received at Fri, 6 Sep 2024 04:54:09 +0200 from mail.ticketnew.com [49.50.81.243] ----- The following addresses had permanent fatal errors ----- (reason: 550 5.1.1 ... User unknown) ----- Transcript of session follows ----- ... while talking to ss.gts.pl.: >>> DATA ... User unknown 550 5.1.1 ... User unknown