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Interesting. This is not an issue that has anything to do with Diafaan SMS Server, it is probably a misconfiguration in the SMS central of your mobile operator or in one of the SMS centrals downstream.

The messages are generated by an SMS server that uses the SMPP protocol, SMPP uses text messages in a specific format to report the status of the messages back to the sender of the message. However, you are using modems to send the messages and wireless modems use another format to indicate status updates, not SMPP receipts. Somewhere in the SMS network, (some of) the SMPP receipts are not handled properly and are converted to the SMS messages you receive.

Since the problem is located in the SMS network, you can ignore these messages. If the messages are a problem for you, it is also possible to filter out these messages (basic- and full edition only), but that will require some programming.

Regards, Henk

Hello Robert,

This is not an SMS message that is sent from a phone, it is a (non) delivery SMPP receipt that originates from the SMS central. It indicates that a previously sent message could not be delivered to the mobile phone. An SMPP receipt is almost identical to a normal message but it has an extra flag to indicate that it is a receipt.

Normally, Diafaan SMS Server treats the receipt as a status update but in this case it is treated as a received SMS message. I would like to see the receive log record of one of the receipts to see if there is something wrong with the message format, you can right-click on the line in the receive log and select 'Export to file' to save the receive log entry to a file. I would also like to see the configuration file (menu options 'File-Export-Configuration) to check the settings of the SMPP Gateway. You can send the log files to 'dms@diafaan.com'.

Regards, Henk