SMS OTPs sent to users in China are not being delivered


Version Affected:  All


OTPs delivered via SMS to mobile devices in China are not getting through.



China blocks a lot of SMS traffic originating from outside China unless it uses a registered prefix.



Use the registered [SecureAuth] prefix when sending SMS to China.

Do the following so the realm that sends the SMS includes a prefix saying [SecureAuth]

Go to the realm that sends the SMS and open Overview Tab | Content and Localization | Verbiage Editor

Search for this setting:


It will most likely already have a value of:  
Your One-Time Passcode is {0}.

Change it so it says:
[SecureAuth] Your One-Time Passcode is {0}.


Save the change then test.

The SMS should be sent with our signature prefix and be allowed through as our provider has registered our signature.




SecureAuth Knowledge Base Articles provide information based on specific use cases and may not apply to all appliances or configurations. Be advised that these instructions could cause harm to the environment if not followed correctly or if they do not apply to the current use case.

Customers are responsible for their own due diligence prior to utilizing this information and agree that SecureAuth is not liable for any issues caused by misconfiguration directly or indirectly related to SecureAuth products.

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