Here’s how to run large-scale WhatsApp campaigns safely:
Why WhatsApp Bans Bulk Messages
No purchased lists – Only opt-in contacts allowed No promotional cold messaging – First messages vietnam whatsapp number data must be utility-based No unofficial tools – Only WhatsApp Business API permits bulk messagingPenalties: Account restrictions, permanent bans, or legal action (under GDPR/TCPA).
How to Send Bulk Messages Legally
1. Use WhatsApp Business API
The only approved method for bulk messaging. Benefits:
✔ Pre-approved message templates (No free-form spam)
✔ Official green-check verification (Builds trust)
✔ CRM integrations (HubSpot, Salesforce)
Providers: Twilio, MessageBird, 360dialog.
2. Secure Explicit Opt-Ins
Collect consent via:
Website forms (Checkbox: "I agree to WhatsApp updates")
SMS double opt-in ("Reply YES to confirm")
QR codes with clear disclaimers
Never import contacts without permission.
3. Send Only Approved Template Messages
WhatsApp allows bulk sends only for:
Order updates (e.g., shipping confirmations)
Appointment reminders
Account alerts (e.g., password changes)
For promotions: First send a utility message, then follow up after user replies.
Best Practices to Avoid Bans
A. Message Frequency
Max 1-2 bulk sends/week
Higher tiers (API Premium) allow more volume
B. Content Rules
No links in initial templates (unless pre-approved)
No promotional CTAs ("Buy now!") in first message
C. List Hygiene
Remove inactive users (>6 months no reply)
Honor opt-outs immediately ("STOP" = instant removal)
Alternatives for Non-API Users
If you don’t qualify for WhatsApp Business API:
Broadcast Lists (256 contacts at a time)
Requires manual sending
Higher risk of flags
Chatbots (ManyChat/WATI)
Auto-responders for opted-in users
No true "bulk" sends