| Event Id | 1153 |
| Source | MSExchangeMTA |
| 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) |
| Event Information | According To 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. Check for network connectivity issues. Ensure that the NICs are all using the latest drivers. Also, verify that the NICs are configured to use the right speed, 10 Mbps or 100 Mbps, as appropriate to the port to which the NIC is connected. To help Microsoft Product Support Services determine the problem, create log files. For more information, see Microsoft Knowledge Base articles 163032 and 168906. To create Ap*.log files, on the Diagnostics Logging tab of the Server Properties dialog box, select MSExchangeMTA, and then set the logging level of the Interoperability and Interface categories to Maximum. To create Bf*.log files, set the logging level of the Application Protocol Data Unit (APDU) and X.400 service categories to Maximum. Save all MTA log files (mtadata\*.log), Event Viewer output, and database files. |
| Reference Links | Microsoft product: Exchange Version: 6.5.6940.0 Event Source: MSExchangeMTA Event ID: 1153 |
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