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Event ID: 7519 Source: MSExchangeTransport

The originating IP address of message with ID <id> could not be determined based on its Received headers.
From a Microsoft support post: This event means the message headers added by your ISP is not RFC- compliant or one of your servers is issuing non-standard receive headers or may be caused by incorrect configuration in the perimeter list.

Please go to ESM and locate Message Delivery -> General, open the perimeter
list, please check if there is any incorrect IP listed."
As per Microsoft: "This event indicates that Sender ID filtering is not able to correctly process a message. This error may occur if one of your servers is issuing non-standard receive headers. This error may also occur if you have not correctly configured the list of internal servers". See MSEX2K3DB for additional information about this event.

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