An OTP that arrives two minutes late. A delivery update sent from a number the customer does not recognise, so it gets ignored or reported as spam. A marketing SMS campaign that gets blocked entirely because the sender was never registered. Most SMS problems Sri Lankan businesses run into are not about the message - they are about using a consumer-grade SMS tool for a business-grade job. Ceytrex eSMS is built specifically for the second case.
What Ceytrex eSMS Is
Ceytrex eSMS is an enterprise SMS gateway: a business sends transactional and marketing messages through a documented API or an assisted onboarding process, under a registered, branded sender name, with delivery reporting to confirm what actually reached the customer. It is built for businesses that need OTPs, order updates, or appointment reminders to arrive reliably - not for one-off personal texts.
Core Features
- Branded sender names - messages arrive from a recognisable, approved business identity instead of an anonymous long number
- API-ready delivery - documented HTTP APIs for integrating OTPs, alerts, and system notifications directly into your application or CRM
- Unicode & local languages - correct encoding for English, Sinhala, and Tamil, with transparent rules on how language affects message length and segment count
- Delivery visibility - reporting and reconciliation so finance and operations teams can track sends against prepaid credits
- Compliance-aware onboarding - guidance on acceptable use, consent, and message categories before any traffic goes live
- Local support - a Colombo-based team for setup, troubleshooting, and scaling, not an offshore-only help desk
Common Use Cases
| Use Case | Why It Needs an Enterprise Gateway |
|---|---|
| OTP & verification codes | Needs guaranteed fast delivery and a recognisable sender - delayed OTPs directly cause failed logins and abandoned signups |
| Order & delivery updates | Customers need to trust the sender is really the business, not a scam number |
| Appointment reminders | Reduces no-shows, but only works if the message reliably lands before the appointment |
| Approved marketing broadcasts | Requires registered sender IDs and consent handling to avoid being blocked as spam |
How Onboarding Works
- 1. Discovery - Ceytrex confirms your expected message volumes, message types, and whether you need direct API integration or assisted sends
- 2. Registration & sender setup - business verification and branded sender registration, handled with clear timelines and documentation so you know exactly what stage you are at
- 3. Credit & go-live - load prepaid SMS credits, run test deliveries to confirm formatting and sender ID, then scale with predictable per-message costs
Why Sender Registration Matters More Than Most Businesses Realise
An unregistered or unbranded SMS sender is one of the most common reasons messages get filtered, ignored, or reported as spam by customers. Registering a branded sender name is a one-time setup step that materially improves delivery and open rates for every message sent afterward.
Telecom carriers in Sri Lanka increasingly filter traffic from unregistered or generic senders, especially for marketing content. A business that skips proper sender registration to save setup time often pays for it later in blocked campaigns and customers who no longer trust messages from an unfamiliar number.
Get your SMS sender registered and connected.
Branded sender names, API-ready OTP delivery, and Sinhala/Tamil support - set up by a Colombo-based team.
Frequently Asked Questions
How long does branded sender registration take?
Timelines depend on carrier approval, but the Ceytrex eSMS team handles the registration and verification process with clear, documented timelines so you always know what stage your application is at.
Can Ceytrex eSMS send SMS in Sinhala and Tamil?
Yes. Ceytrex eSMS supports Unicode encoding for Sinhala and Tamil in addition to English, with transparent rules on how using non-Latin scripts affects per-message character limits and segment count.
Do I need developers to integrate Ceytrex eSMS?
Not necessarily. Ceytrex eSMS offers a documented HTTP API for businesses that want to integrate SMS directly into their application, and an assisted-send option for businesses that prefer not to build a technical integration.
How is Ceytrex eSMS priced?
Ceytrex eSMS runs on a prepaid credit model with predictable per-message pricing. Contact the team with your expected volume and message types for a specific quote.
What happens if my SMS campaign is flagged as spam?
Proper sender registration and compliance-aware onboarding - both part of the standard Ceytrex eSMS setup - substantially reduce this risk. The onboarding process reviews your message categories and consent handling before any campaign traffic goes live.