We are currently monitoring two distinct matters affecting SMS delivery to China and Operator: China Mobile. As background, Telesign previously communicated updates regarding China's evolving registration and delivery requirements for international messaging traffic, including the limitations impacting organizations without a local registered presence in China. Customers may refer to our previous communication for additional context:
Regulatory / Signature Registration Requirements China regulators continue to enforce signature-registration requirements for SMS traffic delivery into China. As a result, generic signatures previously used to support certain international traffic are no longer available through our existing routing ecosystem. Customers without an approved and registered dedicated signature may therefore experience delivery degradation or an inability to deliver traffic into the China Operators. We continue to evaluate available options; however, traffic from international organizations that do not meet the applicable registration requirements should continue to be treated as best effort.
Dedicated Signature Delivery Investigation Separately, we are actively investigating delivery degradation affecting a limited number of customers utilizing dedicated signatures. Our teams are working with providers to identify the root cause, evaluate alternate routing and registration options where applicable, and restore impacted traffic. At this time, this operational investigation is understood to be separate from the broader generic-signature limitation described above. Customers may also be aware of the currently active China Mobile delivery incident being investigated by our operations teams:
Customer Guidance We recognize that these matters may appear connected because they affect the same destination and have occurred during a similar period. However, the current understanding is that the generic-signature limitations and the dedicated-signature delivery investigation represent separate workstreams, each with its own remediation and investigation activities. We will continue to publish updates as additional information becomes available. Customers experiencing delivery issues to China are encouraged to contact Telesign Support so that their specific signature configuration, registration status, and traffic routing can be reviewed.
Posted Oct 28, 2026 - 09:58 PDT
This scheduled maintenance affects: Regulatory Updates (APAC).