Retry Count: As a best Practice it is advised to introduce a concept called Submission Retry count based on one of the column in the tip_businessmessage_rt table such as NOTM. For every re-submission, increment the Retry count for a specific b2bMessageID for a pre-configured Retry count. An email notification can be sent to the B2B Administrator once the maximum Retry count is reached.
The above Exception handling mechanism applies to inbound as well. Instead of resubmitting the message through IP_OUT_QUEUE, it is required to configure a listening inbound File end point and drop the file, with appropriate naming convention. B2B picks it up and process in the inbound direction as if it has come from the Trading partner.
Note: As this approach uses file protocol for inbound processing, the exchange specific features may not be available.