用了高级群发接口发送指定openid集合后，提示发送成功 {"errcode":0,"errmsg":"send job submission success","msg_id":3147483687,"msg_data_id":2247486174} 但是 集合内的openid对应用户一个都收不到消息；想在后台核查一下是否发送。

是否发送成功后，需要等一段时间才能收到？大概多久？

appid:wxf32b66b31ff81cdc

参数：

str_send :{"mpnews":{"media_id":"MSxf7L5gB-BzjLgaJB7hVNM9yKGEf0rml8bu3Bw7O0E"},"msgtype":"mpnews","send_ignore_reprint":"0","clientmsgid":"clientmsgid_2","touser":["oUEHZw3PuTh8waJDQsQp6KS9HATo","oUEHZw9vEqkNLa_xB4clxSkXEBOA","oUEHZw25j8DcOjOjDxcp9J7To06w"]}