History

  1. Message delivery receipts Send and receive message delivery receipts
    Message delivery receipts 
    Send and receive message delivery receipts
    changed via the API .
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  2. 消息送达通知 发送和接收消息送达通知
    消息送达通知 发送和接收消息送达通知

    消息送达通知 
    发送和接收消息送达通知

    changed via the API .
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