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您好，调用[注册回调接口](https://open.dingtalk.com/document/orgapp-server/registers-event-callback-interfaces)报错：{"errcode":71009,"errmsg":"返回文本非success"}，是因为
回调地址返回的内容必须是success文本经过加密后的结果。请确认您给钉钉返回的数据格式为{"msg_signature":"xxx","timeStamp":"xxx","nonce":"xxx","encrypt":"xxx"}
具体排查过程可点击此处查看。