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Event ID: 1153 Source: MSExchangeMTA

Source
Level
Description
An interoperability error occurred. A reliable transport service element (RTSE) error occurred. Incorrect session protocol data unit (SPDU). SPDU ID <ID>, SPDU field in error <error code>. [<value> <value> <value> <value>] (14).
Comments
 
As per Microsoft: "This event usually indicates that there are networking issues in the environment. Network connections may be sporadic. This is usually caused by a bad network interface card (NIC), a bad driver, or a NIC configured to use the Auto Sense option to detect port speed". See MSEX2K3DB for information on this event.
As per Microsoft, this event can be one of the effects of network connectivity problems between Exchange sites (especially after changes in network hardware). See ME225206 for details.

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