We have a requirment where we proactively need to send details of the failed email and fax outputs to sales reps . In NAST an email output is set as successfully processed once this message is transferred to exchange server for processing .If for any reason the email O/P fails in SOST the NAST will not be updated with the error status. Is there any way we capture this error in SOST and link it back to the order or delivery and the output type i.e. link the SOST record with NAST . Any sugessions are highly appreciated .I am unable to find a way to link the order/delivery +output type + Email O/P success or failed in SOST .