Subject: Returned mail: see transcript for details

From: postmaster <[email-masked]>
Date: Thu, 16 Oct 2025 13:09:40 +0300

The original message was received at Thu, 16 Oct 2025 13:09:40 +0300
from:
<[email-masked]>

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D0B.eurprd03.prod.outlook.com 2025-10-16T10:09:40.789Z 08DE09C1612B084B])

   ----- Transcript of session follows -----
... while talking to strangbetong.se.:
>>> DATA
<<< 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D0B.eurprd03.prod.outlook.com 2025-10-16T10:09:40.789Z 08DE09C1612B084B]
550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D0B.eurprd03.prod.outlook.com 2025-10-16T10:09:40.789Z 08DE09C1612B084B]
<<< 503 5.5.2 Need rcpt command [DU2PEPF00028D0B.eurprd03.prod.outlook.com 2025-10-16T10:09:40.790Z 08DE09C1612B084B]