Important Update: TRAI Mandates New SMS Header Format

Important Update: TRAI Mandates New SMS Header Format

Hello everyone,
We have an announcement regarding a new regulation by the Telephone Regulatory Authority of India (TRAI) that affects all application-to-person (A2P) SMS services. Starting on May 6, 2025, TRAI has mandated that telecom service providers in India append a suffix to the SMS sender header based on the type of message being delivered. Aimed at improving transparency, this change will impact how your SMS is displayed in the recipient's inbox.

What is the change?

According to TRAI's latest regulation, the sender header section of all A2P SMS messages must include a suffix that will convey the type of message being delivered. Below are the suffixes and their respective categories:
  • P: Promotional messages
  • S: Service messages
  • T: Transactional messages
  • G: Government-authorized messages
For example, if your SMS header read JD-ZYLKER previously, after the change it will read XY–ZYLKER–P, where XY is the operator and circle code, and P stands for promotional message.

Who does the regulation affect?

This change affects A2P SMS services. This means that if you're using bulk SMS to send promotional, transactional, or customer service alerts, this will affect the way your message header is displayed to your recipients.

What is the purpose of this regulation?

Through this regulation, TRAI aims to:
  • Improve transparency and user experience by displaying the SMS type.
  • Reduce spam and fraudulent messages.
  • Standardize SMS headers to monitor messages more effectively. 

How will it affect businesses?

This change will only affect the way message headers are displayed to your recipients. Businesses are not expected to add the suffix manually or change their existing SMS marketing practices. The suffix will be automatically included in the SMS header by the telecom service provider during the DLT scrubbing based on the type of SMS you're sending.
 
Best regards,
Team Zoho Campaigns
    • Sticky Posts

    • Marketer's Space: Proven tips to improve open rates – Part II

      Hello Marketers! Welcome back to another post in Marketer's Space! We're continuing from where we left off a fortnight ago. We ended the previous post discussing the subject line, and we'll continue from there. Let's dive right in. Pre-header Pre-header
    • Tip of the week 03 - Sending emails in batches

      Today's marketers not only want their email marketing to be efficient, but also smart. For an email campaign, you may think you have all the essential elements for lead conversion—a big mailing list, an attractive template design, and the most-engaging message content, but after hitting the ‘send’ button, you may not get the expected conversions. Wondering why? Here’s one of the major reasons. Many marketers miss out on sending the email campaign the right way. Did you know that you should not be
    • Tip of the week 04 - Know about your recipients' 'prime open time.'

      In today's market, the importance of customer behavior is astounding, with a vast amount of research and resources going into finding how customers make decisions. The process of persuading your customers to open your email and click on your call-to-action becomes easy when you understand the psychology behind their behavioral traits. Time to turn into a psychologist! Let's get to the basics—you want your emails to resonate well with your recipients. So, what's the primary thing involved here? It's
    • Zoho Campaigns Expert Diaries on SoundCloud, Spotify, Apple Podcasts, and YouTube

      Hi email champs,  As email marketers, we find great lessons in each other's works—be it the subject lines that worked good, the design that was received well, or the CTA that had the maximum clicks. Email marketing encompasses a wide variety of topics spanning everything from creation and design to development and deliverability.  Here's when we from the Zoho Campaigns team found the need to build an email marketing community comprising of seasoned marketers and email geeks who can help each other
    • Email Deliverability Tip #3: Seal the deal with the preheader

      In the last post, we learned about the subject line. Today we'll be learning about the preheader. A preheader is the short text that follows the subject line in an email. The preheader is designed to hint at what your email message is all about. A good preheader should act as a second subject line and convince your contacts to open the email. Now, let's learn the best way to craft a preheader. Your subject line and preheader should work together and accurately convey the gist of your email. Keep
      • Recent Topics

      • inventory removal at packing list or shipment.

        currently our system is set to remove inventory at invoice. This is creating an inventory nightmare? Is it possible to change the settings to remove the item from inventory at either the packing slip stage or shipping the item.
      • How to add employee and not invite them to log in?

        I want to add 50 employees, but invite them only when everything will be configured and ready. Is it possible? Should we create employee profiles and then convert them later? Thank you,
      • Any Offline Developing Environements or IDE's for Zoho Creator

        Hi there, Is there any offline developing environment for zoho creator like the Eclipse for sales force.com? So that i could make my development faster. Its taking a laot of time to write save and verify the code in Zoho Creator online. Thanks in advance
      • How is Your eCommerce Experience w/Zoho Inventory?

        First off, I'm SUPER grateful for the advent of Zoho Inventory and now the Zoho Commerce Suite. Overall, Inventory is a great product, especially for customers without an eCommerce presence. For eCommerce companies (especially those shipping more than ~10 packages/day), however, there are certain drawbacks that keep my clients from moving over to Zoho Inventory: Cons: 1. Invoice + Package Creation from Shopify/Other eCommerce Integrations: Zoho Inventory makes the somewhat perplexing decision to
      • Ability to Use Both AND and OR When Creating Rules (Advanced Conditions)

        I'd like to be able to use more complicated logic when setting up rules. E.g. in Zoho Mail, I can choose "Advanced conditions (AND/OR) to create a rule that can be applied to multiple subject lines from the same sender. But in Zoho TeamInbox, I will have
      • Zoho Desktop App- Unable to Minimize/Freezes

        I'm having issues with my Zoho Mail desktop app (PC). When go on my desktop and open the app this is what happens: - Unable to minimize and close app (in the screenshot attached you can see at the top right there is no option to minimize/close) - Unable
      • Zoho Invoice Zapier Integration

        Is there still a way to use Zapier with Zoho Invoice? I've read online that that migrated to Zoho Books or Billing but since I am just using Invoice I can not find a Zapier Connection anymore.
      • Conect chat of salesiq with zoho cliq

        Is there any way to answer from zoho cliq the chat of salesiq initiated by customers?
      • Bug: OAuth 2.0 State Parameter fails with Pipe Delimiters (RFC 6749 Non-Compliance)

        I've discovered a bug in how Zoho's API Console handles the OAuth 2.0 authorization flow when the state parameter contains pipe characters (|), and I'm hoping the Zoho team can address this in a future update. The Issue Zoho's OAuth 2.0 implementation
      • Zobot with Plugs

        Hello, I am having a problem with Zobot using Plugs. Here is my current flow: When I run the flow, I should immediately see the messages from the initial cards (Send Message cards), then after running the plug, and finally, see the messages after the
      • Print a document from Zoho Writer via Zoho Creator

        If i use the code below i can get writer to create a new document or email it to me but i want to be able to print it directly from the browser and not have to send it via email and then print. Below is the code im using. Attached options form zoho writer
      • Training for How can i Operate the Software Features

        need to Help for Training of the ZOHO Billing Software
      • Automating Vendor Contract Management between Zoho Contracts and Zoho Books using Zoho Flow

        Managing vendor agreements across procurement and finance systems often requires manually downloading executed contracts and attaching them to vendor records. This can become time-consuming and difficult to manage when dealing with a large number of contracts.
      • VIEW HEADERS PARAMETERS

        A function was created in zoho creator. In the microservices “https://creator.zoho.com/userhome/<adminuser>/admindashboard#/microservices”. A custom API was created and associate the function. In the postman I send some data, how can I visualize what
      • Problem applying batch operation error keeps looping that error

        Problem applying batch operation error keeps looping that error an wont login
      • Shared Email Sending Duplicate Copies of Emails

        Hi there, We recently have moved our info@ email to Team Inbox to trial. We set this channel up using the Microsoft setup which works fine and have 3 users. I am wanting to know: 1. When I send a new email, it will create a copy of that email and send
      • merhaba

        merhaba sosyal medya paketimiz mevcut ama yorumları göremiyoruz ve o yüzden cevap veremiyoruz destek rica ediyoruz.
      • Teaminbox not working

        We couldn't send or receive any mail within the team inbox. Displaying error 'Unable to process this request.'
      • Related lists New option in missing

        hi I have created quite a few modules and added as related lists to my main module. Some have new, some dont I can not see why?
      • Cliq and ToDo integrations?

        I'm a bit surprised not to find any way to open a Cliq chat for the current thread, or to create a Zoho Mail ToDo from a thread. Are these on the roadmap?
      • Reply-to names are mangled

        Hello, I'm seeing an odd behavior in replies. Steps to reproduce: 1. Click reply to an email from "John Doe <doe.john@example.com> in TeamInbox Expected outcome: TO field pre-filled with "John Doe <doe.john@example.com>" Actual outcome: TO field pre-filled
      • I CANT UPGRADE MY FREE ACCOUNT

        I TRY TO UPGRADE MY FREE ACCOUNT AND I COULD NOT UPGRADE IT CAN SOMEBODY TELL ME WHY? AND I HAVE THE MONEY SO.
      • Level up your ASO game with tags & categories in store reviews

        Introducing tags and categories in Apptics' store reviews Dear Apptics community, If your app is listed on the Play Store or App Store, you already know how important store reviews and ratings are. They’re one of the most direct signals of user sentiment
      • Including attachments with estimates

        How can attachments be included when an estimate is sent/emailed and when downloaded as a .pdf? Generally speaking, attachments should be included as part of an estimate package. Ultimately, this is also true for work orders and invoices.
      • Adding VENDOR SKU to PURCHASE ORDERS

        how can we add the Vendor SKU when issuing a Purchase Order , so the PO shows the Supplier SKU and our own Internal SKU , which is what we want to receive into the system .
      • Possible to freely prompt/query CRM data using Zia?

        Is it possible to prompt Zia to query on any information stored in the CRM, especially on the data stored in custom text fields? My use case is the people in my organisation have entered lots of text in custom text fields to capture information from an
      • Restrict employees to take only one day holiday from a multi-day festival holiday

        Hi everyone, I have a requirement related to Optional/Festival Holidays in Zoho People. For example, in the month of May there are three optional holiday dates: May 11, May 12, and May 13. Employees can choose one of these days as their optional holiday.
      • Cannot modify colours in invoice email template

        I have tried switching browsers... but I cannot change the (pretty horrible) default colours in the preset email when sending an invoice... the blue banner, red outstanding total and the bright green button... I can change other things but not the colours?
      • Cannot find zpuid for Zoho Projects user

        I'm using the Zoho Projects v3 API to create a task. The task is created successfully, but in order to assign the task owner, the "Create a Task" API also requires the zpuid of the task owner. Unfortunately I cannot find any user-related API calls that
      • Print a document from Zoho Writer via Zoho Creator

        If i use the code below i can get writer to create a new document or email it to me but i want to be able to print it directly from the browser and not have to send it via email and then print. Below is the code im using. Attached options form zoho writer
      • Allow styling for specific Subform fields in Zoho Creator

        Sometimes in forms we need to visually highlight a specific field inside a Subform (for example Sanctioned Amount, Approved Value, Critical Fields, etc.) so that users immediately notice it while entering data. Currently there is no direct UI option to
      • Placeholder format in Number field does not reflect Max Digits configuration

        When the Max Digits (Maximum digits of number) property is set to a smaller value (for example, 2 digits), the placeholder in the input field still displays a 7-digit format (#######). The same behavior can also be observed in Decimal and Currency field
      • How does SKU work when selling products in parts in Zoho Inventory

        Hello everyone, Zoho Inventory does not understand the physical cutting of the piece.. It only tracks quantities of the unit (like feet ). So when you sell part of an item, the system simply reduces quantity for that SKU. Assume that i have a 50 ft long
      • CRM Cadences - working timesThe Friday afternoon? The next Monday morning? Not at all?

        I think I’m writing saying that cadence emails are only sent during the organisations set working hours in CRM. So if a particular email is set to send for example in three days and that lands on a Sunday (when working hours are not operational) when
      • CRM Cadences - working times

        I think I’m right in saying that cadence emails are only sent during the organisations set working hours in CRM. So if a particular email is set to send for example in three days and that lands on a Sunday (when working hours are not operational) when
      • Push Notification for New Bookings in Zoho Bookings App

        when a someone schedules an appointment through the booking page, is there any option to receive a push notification in the mobile app?
      • Add the same FROM email to multiple department

        Hi, We have several agents who work with multiple departments and we'd like to be able to select their names on the FROM field (sender), but apparently it's not possible to add a FROM address to multiple departments. Is there any way around this? Thanks.
      • Zoho Desk View Open Tickets and Open Shared Tickets

        Hi, I would like to create a custom view so that an agent can view all the open tickets he has access to, including the shared tickets created by a different department. Currently my team has to swich between two views (Open Tickets and Shared Open Tickets).
      • Zoho Expense - Bi-Weekly Report Automation

        Hi Zoho Expense Team, My feature request is to please include an option to automate creation of reports bi-weekly (every 2 weeks)
      • Application Architecture in Zoho Creator: Why You Should Think About It from the Start

        Many companies begin using Zoho Creator by building simple forms to automate internal processes. This is natural — the platform is extremely accessible and allows applications to be built very quickly. The challenge begins to appear when the application
      • Next Page