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Exchange 2019 SMTP Relay Issue After Adding New Server to Send Connector
I have an Exchange environment with two Exchange 2019 servers — one on-premises (EX01) and the other recently deployed in an Azure VM (EX02). The goal is to eventually decommission the old on-premise...
Wild shot, but. Azure will block any outgoing connections on port 25. https://learn.microsoft.com/en-us/azure/virtual-network/troubleshoot-outbound-smtp-connectivity