Exchange 2007 - The server don't send dsn message for external users

Hello,
Our exchange 2007doesn't send dsn message for external users but for internals it is ok, I check my configuration but all seems to be ok
Have you any idea please?
Thx

Hi,
To narrow down the cause, let's firstly try to check the following configuration:
Get-TransportConfig |fl
Get-RemoteDomain | select identity, NDREnabled
Get-SystemMessage
Thanks,
Angela Shi
TechNet Community Support

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Please try to verify whether there is any expired certificate from the computer personal store.
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Please remember to mark the replies as answers if they help, and unmark the answers if they provide no help. If you have feedback for TechNet Support, contact [email protected]
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Exchange 2007 - The server don't send dsn message for external users

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