DND Registry Scrubbing: Regulatory Latencies
Understand international SMS regulatory scrubbing delays, TRAI DLT template registration, and nighttime messaging curfews.
Systematic Delivery Diagnostic Tree
India TRAI Distributed Ledger Technology (DLT) Registration
All messages terminating in India must have registered sender headers (Header ID) and pre-approved message templates (Template ID) registered on telecom blockchain portals.
Promotional vs Transactional Route Separation
Promotional traffic is blocked on DND numbers and restricted to daytime hours (9 AM to 9 PM). Transactional OTPs must use registered transactional routes to bypass DND.
Strict Variable Length Matching in Templates
If dynamic variables in an OTP message exceed the character length registered in the DLT template, carriers drop the message instantly without delivery.
Frequently Asked Questions
What is DLT registration for SMS in India?
DLT is a mandatory blockchain-based system established by TRAI where businesses must register their business entity, headers, and SMS templates to prevent spam.
Why do SMS messages fail to deliver to Indian numbers?
Unregistered templates, mismatch in template variable length, or sending promotional messages to DND-registered numbers will cause immediate message rejection.