Customers use 189 mailbox to send mass messages. Why didn't less than 20 customers send it?

Let the customer determine whether the sender is within the limit first, and then let the customer pay attention to the length of the message. If the number of short messages exceeds 67, it will be split into multiple short messages, and the sending of short messages will fail. If it is not the case, please contact customer service and provide a specific error prompt or password. Customer service 22 answers for you. On-demand broadband, quick thinking, reply to the keyword "on-demand broadband" and you can handle it directly, which is convenient and fast.