I am using a siemens modem to receive MMS on a long number. I download receievd MMS over a GPRS connection by connecting to the GPRS APN of the operator.
Is it possible for me to have a 2-way for the MMS i.e. send a message to the sender of the MMS saying 'Thank you for sending the MMS'.
Your script, or other program that processes the received messages could generate an HTTP request back to NowSMS to send a reply ... but there is no built-in way of doing this.