
📢 Key 2025 DLT Updates for Bulk SMS
1. Mandatory Header Suffixes (Effective May 6, 2025) All SMS headers now include a suffix to indicate message type:
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-Pfor Promotional -
-Sfor Service (Implicit) -
-Tfor Transactional -
-Gfor Government (TRAI-exempted) This helps recipients instantly identify the nature of the message.
2. No Free-Text Messages Allowed Every SMS must match a pre-approved template. Dynamic content is allowed only within {#var#} placeholders.
3. Consent Management is Mandatory Promotional messages can only be sent to users who have explicitly opted in. Consent records must be maintained and auditable.
4. Stricter Penalties for Non-Compliance
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Messages from unregistered headers or templates are instantly blocked.
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Fines range from ₹1,000 to ₹10,000 per violation.
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Repeat offenders risk blacklisting.
5. DLT Registration Still Mandatory All businesses must register on a DLT portal (e.g., Jio, Airtel, Vi) to send any kind of bulk SMS—promotional, transactional, or service.
6. Improved Transparency & Delivery Rates The suffix system and template enforcement aim to reduce spam, boost trust, and improve delivery rates for legitimate businesses.
💰 Updated SMS Pricing (2025)
| Message Type | TRAI Fee | Operator Fee (Approx.) | Total per SMS |
|---|---|---|---|
| Promotional | ₹0.025 | ₹0.10 – ₹0.15 | ₹0.125 – ₹0.175 |
| Transactional | ₹0.025 | ₹0.15 – ₹0.20 | ₹0.175 – ₹0.225 |
| Service (Explicit) | ₹0.025 | ₹0.12 – ₹0.18 | ₹0.145 – ₹0.205 |
Note: Charges are per 160-character segment.