Subject: Returned mail: see transcript for details

From: postmaster <[email-masked]>
Date: Mon, 29 Sep 2025 08:00:35 +0200

The original message was received at Mon, 29 Sep 2025 08:00:03 +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 [AMS1EPF00000044.eurprd04.prod.outlook.com 2025-09-29T06:00:35.304Z 08DDFC112D3DF3E5])

   ----- 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 [AMS1EPF00000044.eurprd04.prod.outlook.com 2025-09-29T06:00:35.304Z 08DDFC112D3DF3E5]
550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [AMS1EPF00000044.eurprd04.prod.outlook.com 2025-09-29T06:00:35.304Z 08DDFC112D3DF3E5]
<<< 503 5.5.2 Need rcpt command [AMS1EPF00000044.eurprd04.prod.outlook.com 2025-09-29T06:00:35.304Z 08DDFC112D3DF3E5]