Scheduling and throttling bulk campaigns
For promotional sends above 50k recipients, throttle the rate so your inbound team can keep up. Set exact send times and per-minute caps via dashboard or API.
The fastest-to-inbox send isn't always the best one. Sending 500k promotional SMS in two minutes triggers 500k possible replies and calls in the next fifteen minutes. For most teams, spreading the send over 30–60 minutes produces better economics.
Controls available
- Schedule — pick an exact IST date and time, or choose the next allowed promotional window (9am IST the following day).
- Throttle — cap throughput to N messages per minute so downstream systems can keep up.
- Stagger by timezone — not really needed for India but useful if you have NRI contact lists.
- Quiet hours — auto-pause sends between 9pm and 9am IST for promotional categories.
All of these are configurable per-campaign on the web composer and through the API's throttle and schedule_at fields.
Browse other help categories
Getting started
Create your SMSLocal account, add INR credits to your wallet, complete DLT registration, and send your first compliant SMS, WhatsApp, or OTP in under fifteen minutes.
WhatsApp Business API
Complete guide to WhatsApp Business API — onboarding, Meta template approval, chatbot flow setup, shared team inbox, quality rating management, and conversation analytics.
AI WhatsApp Agents
Train your AI WhatsApp agent on your own knowledge, sync your product catalogue, configure handoff triggers, and serve customers across twelve Indian languages.
OTP & Transactional
Priority routing to the fastest carrier, automatic retry and failover logic, idempotency keys to prevent double-sends, and WhatsApp OTP fallback when SMS is slow or fails.
Did this article help?
If something isn't clear or the steps don't match what you're seeing, tell us and we'll fix the doc the same day.