Subject: Returned mail: see transcript for details

From: postmaster <[email-masked]>
Date: Tue, 11 Nov 2025 10:03:20 +0100

The original message was received at Tue, 11 Nov 2025 10:02:45 +0100
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 [DU2PEPF00028D03.eurprd03.prod.outlook.com 2025-11-11T09:03:20.019Z 08DE1EC5A21DF149])

   ----- Transcript of session follows -----
... while talking to gavle.se.:
>>> DATA
<<< 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D03.eurprd03.prod.outlook.com 2025-11-11T09:03:20.019Z 08DE1EC5A21DF149]
550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D03.eurprd03.prod.outlook.com 2025-11-11T09:03:20.019Z 08DE1EC5A21DF149]
<<< 503 5.5.2 Need rcpt command [DU2PEPF00028D03.eurprd03.prod.outlook.com 2025-11-11T09:03:20.020Z 08DE1EC5A21DF149]