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Exchange 2019 test shows I'm open relay
I have an Exchange 2019 hybrid environment. A recent test using the usual telnet to exchange and sending an email from outside to outside shows I'm open relay. I look at the default frontend server...
Run the following command to list all receive connectors and their properties:
Get-ReceiveConnector | Format-List Identity,PermissionGroups,RemoteIPRanges
Ensure that the RemoteIPRanges property for each receive connector is appropriately configured.
You can modify the IP ranges using the Set-ReceiveConnector cmdlet.
Get-ReceiveConnector | Format-List Identity,PermissionGroups,RemoteIPRanges
Ensure that the RemoteIPRanges property for each receive connector is appropriately configured.
You can modify the IP ranges using the Set-ReceiveConnector cmdlet.