[REMINDER] IMDA-mandated Security Update: TLS 1.2 Support Ending 2026-03-24 09:00 SGT

We have postponed this activity to Tue, 24th March 2026, 09:00 SGT

This is a reminder that this postponed activity is scheduled to be applied again tomorrow 2026-03-18 09:00 SGT

If you have already taken the necessary actions, thank you so much and please ignore this reminder.

API endpoints will require TLS 1.3 for secure communication. TLS 1.2 will no longer be supported as mandated by IMDA

1. TLS 1.3 Verification Please test and verify that your client applications and integration environments support TLS 1.3. by using our sandbox environment at:

https://vip.commzgate.net:448/gateway/SendMessage

This is a dummy end-point to test SSL handshake only, no actual SMS will be sent. We recommend updating your client libraries or runtime environments if TLS 1.3 is not currently supported.

2. Update API end-point URL (if needed) For users of our standard API end-point to send SMS messages, please ensure you are using our latest API end-point URL at

https://www.commzgate.net:443/gateway/SendMessage

If you have questions or need assistance verifying your TLS compatibility, please contact our support team at supportdesk@commzgate.com