Subject: Returned mail: see transcript for details

From: postmaster <[email-masked]>
Date: Thu, 16 Oct 2025 12:10:02 +0200

The original message was received at Thu, 16 Oct 2025 12:10:02 +0200
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 [DU2PEPF00028D10.eurprd03.prod.outlook.com 2025-10-16T10:10:02.719Z 08DE09DBB9E6CB83])

   ----- Transcript of session follows -----
... while talking to gavlefastigheter.se.:
>>> DATA
<<< 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D10.eurprd03.prod.outlook.com 2025-10-16T10:10:02.719Z 08DE09DBB9E6CB83]
550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU2PEPF00028D10.eurprd03.prod.outlook.com 2025-10-16T10:10:02.719Z 08DE09DBB9E6CB83]
<<< 503 5.5.2 Need rcpt command [DU2PEPF00028D10.eurprd03.prod.outlook.com 2025-10-16T10:10:02.719Z 08DE09DBB9E6CB83]