Embodiments of the present invention relate to systems, methods, and computer-storage media for suppressing Short Message Service (SMS) communications from a Short Message peer-to-peer (SMPP) client. A selected response algorithm is provided to the SMPP client from a server. A threshold of undesired SMS communications are detected from a SPAM originator that is communicated to the server by way of the SMPP client. A challenge is communicated to the SMPP client from the server. When a challenge response is not received at the server, communications received from the SMPP client are throttled. When the challenge response is received at the server and the challenge response is incorrect, communications received from the SMPP client are also throttled. When the received challenge response is correct, a SPAM originator source identifier is communicated to the SMPP client in order for the SMPP client to throttle communications received from the SPAM originator.