Good morning,
An incoming mail from the Microsoft 365 environment (which of course hosts thousands of customers) was blocked because of IP blacklist;
|
Error: |
550 5.7.350 Remote server returned message detected as spam -> 550 Sophos Anti Spam Engine has blocked this Email because the sender IP;Address is blacklisted. |
Can you please whitelist the Microsoft mailservers. Of course there will be some spam sent, but valid emails should definitely not be boucend..
Received: from AS4PR01MB9398.eurprd01.prod.exchangelabs.com
(2603:10a6:20b:4c9::11) by AM8PR01MB7947.eurprd01.prod.exchangelabs.com
(2603:10a6:20b:36e::13) with Microsoft SMTP Server (version=TLS1_2,
cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8093.17; Fri, 25 Oct
2024 06:45:38 +0000
For instance please whitelist *.prod.exchangelabs.com