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 [
AM2PEPF0001C708.eurprd05.prod.outlook.com 2024-08-15T14:21:26.151Z 08DCBCD511B98EB2]
Delivery incomplete
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d.karolak@braster.eu. Gmail will retry for 46 more hours. You'll be notified if the delivery fails permanently.