History

  1. Message delivery receipts Send and receive message delivery receipts
    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
    changed via the API .
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