Singapore SMS Requirements

IMDA Singapore SMS Requirements – TLS 1.3 or higher
To send SMS messages to Singapore after 1 April 2026
, your browser and other systems must use TLS 1.3 or higher
 when connecting to ClickSend.
From 1 April 2026, systems using lower TLS versions will stop working for SMS delivery to Singapore.
To learn more please visit our help docs.
This update is mandatory and ensures your business remains secure.