To ensure business and channel security and minimize financial loss caused by unauthorized usage, the default frequency limit for sending SMS messages is set as follows:
SMS bombing is a method of sending massive SMS verification messages to numerous phone numbers within a short period of time (such as a day) by using malicious programs or tools to exploit web client or server vulnerabilities, which seriously harasses the phone users.
If harassed by SMS bombing, users will complain a lot and SMS channels will be unavailable. Besides, the business side will also suffer heavy economic losses. Therefore, SMS bombing must be prevented in advance.
Because SMS bombing is generally implemented on servers, it is recommended to apply the following methods to defend against it:
As required by operators, you need to add a signature when sending SMS messages in China. However, if you send international SMS messages to international phone numbers, the signature is optional.
If you want to send SMS messages to Chinese phone numbers with a text template applied for on the international SMS page, you must apply for an SMS signature and add it in the SMS messages to be sent to Chinese phone numbers.
If your customers cannot receive SMS messages, or if you want to check the delivery status of SMS messages sent to users, you can query the delivery records in China SMS Messages or Global SMS Messages -> Statistical Analysis -> SMS Message Records on the Tencent Cloud SMS Console, as shown below:
The sdkappid is the unique ID of an SMS project, which is used to identify the project. The appkey is the corresponding password and must be kept confidential.
For more information on how to create a project, please see the access guide.
To impose no frequency limit on test numbers, contact SMS helper to add the numbers to the allowlist.