Yes, only if they have provided you with consent. As per the recent communication from the DLT operators, an entity can send out promotional and Service Explicit messages to their customers if consent is received from the customers and the same is uploaded on their portal. And, the SMSes can be sent only between 10 am to 9 pm. 

What is a Letter of Authorisation for the DLT Entity Registration process?

Can I send Promotional and Service Explicit(SE) SMSes to my customers registered on DND?

Getting the best SMS delivery rates in India

Messaging APIs

Creation of RCS Templates

Complete RCS onboarding

Adding test devices to your RCS bot

What is an SMS template and how to get it approved?

Find delivery status of the sent SMS

SMS delivery status

How to change SMS Sender ID(Header)

Monitoring SMS in campaigns

SMS not working

Why do you charge for failed SMSs?

Choose SMS sender ID

SMS in regional language

Unicode characters in SMS

Priority SMS

Characters allowed in SMS

Length of unicode SMS

Delivery of Transactional & Promotional SMS

Calculation of length of SMS

How is SMS billed / charged?

TRAI Regulations on Commercial Communications (DLT portal) - SMS in India

SMS Types

Header (Sender ID) Registration

Company/Entity Registration on Operator's Website

How to send SMS using Exotel with DLT Template Scrubbing?

All about consents on SMS DLT

How to create and send SMS on your Exotel trial account

SMS stats

How to send SMS after missed call?

Shorten a long URL and track clicks in SMS

Regulation changes for sending SMS in Singapore

Communication for new DLT guidelines; measures to curb misuse of content templates and headers effective 1st March 2023

Can I allocate multiple sender IDs to an Exophone number?

DLT PLATFORM ERROR CODES IN INDIA

WebEngage Native plugin

CleverTap Native plugin

CleverTap Generic plugin

Connectors

How to Verify your Facebook Business Manager Account?

Configure Exotel's Whatsapp Integration with Clevertap

How to send WhatsApp OTP Messages?

Which Whatsapp features are supported by Exotel's Omnichannel API?

Configure Exotel's Whatsapp Integration with LeadSquared

How to access WhatsApp Business API console on Exotel ?

WhatsApp Analytics Dashboard for Cloud API

How do I configure an Exophone to receive WhatsApp API OTP?

How do I raise an appeal to re-categorize my existing WhatsApp Templates?

Configure Exotel's MoEngage Integration with WhatsApp

Guide to Onboard a Number via ISV Program - Embedded Sign-Up

WhatsApp Payments Integration Guide

WhatsApp Flows Integration with Exotel

How to create and send a Carousel Template on WhatsApp

WhatsApp Catalog and Product Messages with Exotel

WhatsApp’s New Marketing Message Limits Policy Change: Detailed Guide

Send Address Message

Get Started for Meta Tech Providers with Exotel for WhatsApp (ISV)

WhatsApp Flows: A detail guide for dynamic WhatsApp flows

Receive Voice OTP on your phone from Exophone

WhatsApp Authentication Template

Pause Templates based on Read Rates: To Enhance template engagement

WhatsApp Template Re-Categorization Updates: What You Need to Know

WhatsApp Business Account Ownership Transfer - Commonly asked questions

WhatsApp