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What Are The TRAI Rules For Bulk SMS Marketing?

Bulk SMS marketing is the fastest and most effective way in India to reach your target customers, keep them engaged with your brand, and reach a large audience. However, to curb spam and fraudulent messages and provide citizens with a clean messaging experience, the Telecom Regulatory Authority of India (TRAI), a regulatory body under the Government of India, has implemented some strict regulations.

If you want to use Bulk SMS for your business growth, it is essential to understand and comply with these stringent rules set by TRAI.

In this article, we will understand what TRAI? its regulations related to bulk SMS marketing, and the changes made in 2026, in simple language.

What is TRAI?

In simple terms, it is a watchdog for the telecom and broadcasting companies, it’s job is to maintain a balance between various telecom companies (such as Jio, Airtel, and VI) and their customers. In this way, it acts as a referee between customers and telecom companies. In the context of marketing, it is important to know that TRAI is the body that decides who you can send messages to and who you cannot.

TRAI regulations related to bulk SMS marketing (in simple language)?

Making DLT registration mandatory- This is a blockchain-based system; the full name of DLT is Distributed Ledger Technology. Previously, anyone could send messages to anyone using any name. But now, every business has to register with DLT to create a sender ID. No organisation can send messages without registration. This registration is mainly completed in 3 steps-

First, registering your company as an entity.
Sender ID or header registration (the name under which your message reaches the customer).
After that, register the message template that you want to send to people. You cannot make frequent changes to the message content or template.

Obtaining consent before sending SMS messages- Consent is required from all customers to whom you wish to send messages. Consent means you can only send messages to those who have given you permission. Messages sent without permission will be blocked.

Obtaining permission to send messages from customers or your audience can be somewhat challenging. This can be done through online application forms, Google Forms, subscription buttons, registration forms, or even some offline documents. Later, if a customer wishes to withdraw their consent, it is mandatory to act upon their request.

Categorising and scheduling SMS messages- Messages are categorised into different groups based on their type, and certain rules must be followed. For example-

Messages containing updates about special offers, discounts, sales, etc., are categorised as promotional SMS . These messages can be sent between 9:00 AM and 9:00 PM after obtaining the recipient's consent.
Messages related to payment alerts, OTPs, and transaction notifications are categorised as transactional messages . These do not require consent and can be sent 24/7.
Messages providing important information on a particular topic or updates on a situation are categorized as service SMS .

New Suffix Rules in 2026 (Message Types and Identification) - TRAI has mandated the display of specific suffixes for each sender ID based on the type and identification of the message, such as-

Using 'P' for promotional messages like offers and marketing,
Using 'T' for transactional messages like OTPs or payment alerts,
Using 'S' for essential information or service-related messages,
Using 'G' for government messages.

DND and Customer Consent Requirements

DND stands for "Do Not Disturb." This means that if a customer has activated the DND service on their phone, laptop, or tablet, no marketing messages can be sent to them.

In addition, you must have proof that customers have given you their consent to send them messages. The term "Opt-in" is used for this. On the other hand, "Opt-out" has also been made mandatory. This means that every message must include an option to unsubscribe so that customers can unsubscribe from the service if they wish.

Imposing heavy fines or penalties –Now, if an organisation violates the rules established regarding bulk message marketing, it will be subject to heavy fines. According to the rules amended in 2026, if spam messages are sent to the audience, the company concerned may face a fine of ₹2 lakh to ₹10 lakh, and its service may be blacklisted.

Thus, complying with these rules framed by TRAI is not only mandatory because violations can lead to penalties, but also because marketing in accordance with these rules enhances your brand value. At SDGM Technologies , we help you send bulk SMS while adhering to all these regulations, ensuring your marketing is safe and effective.