In one example, a method includes receiving, from a client application executing on a client device, a message transmission request including an identifier associated with a recipient device. The message transmission request is added to an outbound queue based on determining the message transmission request is valid. A message is transmitted to the recipient device based on the message transmission request being included in the outbound queue. Status information specifying a status of transmission of the message is obtained, the status information including an indication of successful transmission of the message. A record of the message transmission request is stored responsive to the causing the transmission of the message, the storing the record including storing the message and the indication of successful transmission of the message.