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What is SMPP?

SMPP (short message peer-to-peer protocol) is a telecommunications industry protocol for exchanging SMS messages over the internet.

It covers the exchanging of SMS messages between SMS peer entities such as short message service centers (SMSCs). SMS messages usually go through an SMPP to connect external systems to a messaging center that handles high SMS volumes. Typically SMPP uses TCP/IP or a related protocol to connect to the message center and to deliver or receive messages from subscribers.