Limitations on SMS Sending Frequency
When a user attempts to log in to an application or website or attempt to send SMS messages to retrieve a password, the user may frequently request for a verification code. To prevent the sending of excessive SMS messages to the same phone number within a short period of time, Huawei Cloud throttles requests for sending SMSs to the Chinese mainland as follows. (Currently, international SMS sending requests are not throttled.) The limitations vary according to the carrier.
Item |
Maximum Frequency |
Description |
|---|---|---|
Maximum number of SMSs sent to the same mobile number |
15 times/minute |
A maximum of 15 SMSs can be sent to the same mobile number within one minute. Excessive SMSs sent to the mobile number are restricted. |
50 times/24 hours |
A maximum of 50 SMSs can be sent to the same mobile number within 24 hours. Excessive SMSs sent to the mobile number are restricted. |
|
Maximum number of times the same SMS can be sent to the same mobile number |
2 times/59 seconds |
The same SMS can be sent to the same mobile number for a maximum of two times within 59 seconds. Excessive SMSs sent to the mobile number are restricted. |
5 times/59 minutes |
The same SMS can be sent to the same mobile number for a maximum of five times within 59 minutes. Excessive SMSs sent to the mobile number are restricted. |
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