The response from the remote server was:
451 4.4.4 Mail received as unauthenticated, incoming to a recipient domain configured in a hosted tenant which has no mail-enabled subscriptions. ATTR5 [
DU2PEPF0001E9BF.eurprd03.prod.outlook.com 2024-08-15T00:56:23.689Z 08DCBAC41685DFCD]
Delivery incomplete
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