Introduction

In today’s fast-paced digital world, communication is the key to business success. Whether it’s confirming an order, sending a reminder, or running a marketing campaign, speed and reliability matter.
That is where Bulk SMS proves invaluable. It is one of the most effective, affordable, and direct channels for customer engagement.

At Inbox Telecommunication, we empower businesses with Bulk SMS, WhatsApp API, IVR, and RCS solutions designed to deliver messages securely and efficiently. This guide covers everything you need to know about Bulk SMS — how it works, its legality, costs, benefits, and why it remains a leading business communication tool.

1. Can I Send Bulk SMS for Free?

Many small businesses and startups explore free Bulk SMS options when starting out. While large-scale campaigns require paid gateways, Inbox Telecommunication offers trial credits that allow users to test our platform and experience its reliability before subscribing to a plan.

Is Bulk SMS Legal?

Yes. Bulk SMS is legal in India when it adheres to Telecom Regulatory Authority of India (TRAI) and Distributed Ledger Technology (DLT) guidelines. Inbox Telecommunication ensures every campaign remains fully compliant with all regulations.

Is Bulk SMS Safe?

Yes. Inbox Telecommunication uses secure, encrypted, and telecom-approved gateways to ensure that all messages are delivered safely, protecting both sender and recipient data.

How Do I Activate Bulk SMS?

Activating Bulk SMS through Inbox Telecommunication is simple:

1. Register on the Inbox Telecommunication portal.

2. Complete DLT registration and verify your business entity.

3. Add your sender ID and message templates.

4. Upload your contact list and start sending messages.

Can I Send 1000 SMS Per Day?

Yes. Depending on your chosen plan, you can send anywhere from a few hundred to several million messages per day using our high-performance gateway.

Is Bulk SMS Still Effective?

Yes. With an average open rate of 98%, Bulk SMS remains one of the most impactful communication tools for businesses across industries.

What Is the Cost of Bulk SMS?

Bulk SMS pricing depends on the route and volume:

• Promotional SMS: ₹0.10 – ₹0.25 per message

• Transactional/OTP SMS: ₹0.15 – ₹0.30 per message
  Inbox Telecommunication offers competitive pricing with scalable plans for businesses of all sizes.

2. How to Send 1000 Messages at Once in SMS

Bulk messaging allows organizations to reach thousands of recipients simultaneously. Inbox Telecommunication provides a reliable and efficient platform to handle high-volume SMS campaigns with ease.

How It Works

1. Sign up on the Inbox Telecommunication Bulk SMS portal.

2. Upload contact lists (via Excel or CSV file).

3. Compose your message (up to 160 characters per SMS).

4. Choose your message route:

   • Promotional Route – for marketing offers and brand campaigns.

   • Transactional Route – for OTPs, updates, and alerts.

5. Send instantly or schedule for a specific time.

How to Send 10,000 Messages on WhatsApp

For businesses using WhatsApp, Inbox Telecommunication offers the WhatsApp Business API, enabling interactive and media-rich messaging with templates, buttons, and attachments.

Is Bulk Messaging Legal?

Yes. Bulk messaging is legal when sent through DLT-registered platforms and with recipient consent. Inbox Telecommunication ensures every campaign adheres to compliance standards.

How to Send Bulk SMS Using a Phone

Inbox Telecommunication’s web portal is mobile-friendly, allowing users to send and monitor campaigns directly from their smartphone without additional software.

Is There a Limit on SMS?

There is no fixed limit. With enterprise-level plans, you can send unlimited SMS through our platform or API.

How Many SMS Can Be Sent Per Day?

Our infrastructure supports high-volume campaigns, enabling businesses to send tens of thousands to millions of messages daily.

What Is the Cost of Fast2SMS OTP?

While Fast2SMS is one of several market options, Inbox Telecommunication provides faster delivery, better reliability, and affordable rates with full DLT compliance.

3. What Is Meant by Bulk SMS?

Bulk SMS refers to the simultaneous sending of text messages to a large audience for promotional, transactional, or informational purposes. It is one of the most cost-efficient methods for engaging customers directly on their mobile devices.

Types of Bulk SMS

1. Promotional SMS: Used for marketing offers, sales campaigns, and announcements.

2. Transactional SMS: Used for OTPs, order updates, and alerts that are triggered automatically by a system or API.

Can Bulk SMS Be Traced?

Yes. Every SMS includes a Delivery Report (DLR), which allows senders to confirm whether the message was delivered successfully.

What Is the Maximum Limit of SMS?

There is no technical limit when using an authorized bulk SMS gateway. Businesses can send messages at scale, depending on their plan.

How Many SMS Can Be Sent in a Day?

There is no daily restriction for DLT-approved senders. Inbox Telecommunication supports all campaign sizes, from small batches to enterprise-scale delivery.

Is Bulk SMS Still Effective in 2025?

Yes. Despite advancements in digital communication, SMS remains one of the most reliable methods for reaching customers — especially in areas with limited internet connectivity.

How Does Inbox Telecommunication Support Bulk SMS Users?

Inbox Telecommunication provides:

• DLT registration and compliance assistance

• High-speed delivery via multiple telecom operators

• Real-time analytics and detailed reporting

• Custom API integration for automation

4. What Is the Best Bulk SMS Service?

Selecting the right Bulk SMS provider is essential for consistent performance, compliance, and customer satisfaction.

Why Choose Inbox Telecommunication

• High Delivery Rates: Messages are delivered quickly and accurately.

• DLT and TRAI Compliance: 100% legal and approved by telecom operators.

• Real-Time Reporting: Full transparency on message status.

• 24/7 Technical Support: Continuous assistance for smooth operations.

• API Integration: Connect your website, CRM, or software easily.

• Affordable Pricing: Flexible packages tailored for every business.

Can I Send Automated Texts?

Yes. Inbox Telecommunication’s API enables automated messaging — ideal for OTPs, order confirmations, and system-triggered notifications.

Which App Is Best for Bulk SMS?

Our web-based platform is secure, user-friendly, and optimized for performance across all devices, ensuring seamless communication management.

Is Bulk SMS Still Worth It?

Yes. Bulk SMS remains one of the most cost-effective marketing channels, offering direct reach, high engagement, and measurable results.

Common Business Use Cases for Bulk SMS

• E-commerce: Order updates, delivery notifications, and promotional offers.

• Banking & Finance: OTPs, transaction alerts, and reminders.

• Healthcare: Appointment confirmations, lab results, and reminders.

• Education: Exam notifications, fee alerts, and event updates.

• Retail & Marketing: Seasonal promotions, loyalty rewards, and flash sales.

• Events & Hospitality: Invitations, confirmations, and real-time alerts.

Conclusion

Bulk SMS continues to be one of the most powerful communication tools available to businesses. With exceptional open rates, fast delivery, and affordable pricing, it provides an effective way to connect directly with customers.

Inbox Telecommunication stands as a trusted partner for all messaging needs, offering reliable, secure, and compliant solutions for businesses across India. Whether you are sending OTPs, alerts, or marketing campaigns, our Bulk SMS platform ensures that every message counts.