Upon receipt of the SMS from the wireless cloud, this iSMS server will try 3 times in a row to POST the message to the server. If the POST attempts are unsuccessful, the message will be placed into the Receive API Failure log and is not be re-sent / re-queued. The message is also placed in the Inbox and Received SMS trace log. The originator will have to resend once the net server is back up or the net server administrator will have to manually review the iSMS server to learn what messages came in while the net server was down.
The Polling method of Receive API was implemented to address this concern.
Sincerely
Jeff