Before you can text customers about orders or offers, you need a registered, compliant sender. This guide walks through choosing the right sender type and getting it approved.
Quick check You need a connected Shopify store syncing to Brevo through Tajo, Editor access or higher, and SMS credits in Brevo. SMS is billed per message sent. You also need collected SMS consent; set this up first with collect SMS and WhatsApp consent.
Step 1: Choose the Right Sender Type
The correct sender depends on the destination country and whether customers need to reply.
| Sender type | Looks like | Replies | Best for |
|---|---|---|---|
| Alphanumeric sender ID | Your brand name | No | One-way alerts in Europe and many countries |
| Long code / virtual number | A standard phone number | Yes | Two-way conversations |
| Short code | A 5 to 6 digit number | Yes | High-volume US and UK promotional sending |
| 10DLC number | A US local number | Yes | US transactional and marketing traffic |
Some countries (notably the US) do not support alphanumeric sender IDs for promotional traffic and require a registered 10DLC number or short code.
Step 2: Register the Sender in Brevo
- Open Brevo > Transactional or Campaigns > SMS settings.
- Click Add a sender.
- Select the sender type from Step 1.
- For an alphanumeric ID, enter your brand name (max 11 characters, no spaces).
- For a number, start the provisioning or registration flow.
- Submit for approval.
Step 3: Complete US 10DLC Registration (If Sending to the US)
US carriers require brand and campaign registration before delivery:
- Register your brand with your legal business name, address, and tax ID.
- Register a campaign describing your message use case (for example, “Shopify order notifications and promotions”).
- Provide opt-in details: where and how customers consent (your Tajo checkout consent checkbox).
- Wait for carrier approval. This typically takes a few business days.
Unregistered US traffic is heavily filtered or blocked, so do not skip this.
Step 4: Set Sender Defaults in Tajo
- In Tajo > Settings > Channels > SMS, select your approved Brevo sender.
- Set the default sender for transactional messages (order confirmations, shipping).
- Set the default sender for marketing messages.
- Save.
Tajo uses these defaults whenever an automation or campaign sends SMS triggered by Shopify events.
Step 5: Stay Compliant
Every marketing SMS must include:
- Clear sender identity (your brand)
- An opt-out instruction, usually “Reply STOP to unsubscribe”
- Messaging only to contacts who explicitly opted in
Honor STOP replies immediately. Brevo processes opt-outs automatically, and Tajo respects the consent status synced from your Shopify checkout.
Tip Keep SMS short and time-sensitive. Use SMS for order and shipping alerts and genuinely urgent offers. Push longer storytelling to email where it costs less per send.
Step 6: Send a Test
- Add your own number as a test contact with consent set to yes.
- Trigger a test from Tajo > Channels > SMS > Send test.
- Confirm the message arrives, the sender shows correctly, and the STOP instruction is present.
Troubleshooting
| Symptom | Likely cause | Fix |
|---|---|---|
| Sender ID rejected | Country does not allow alphanumeric IDs | Provision a number instead |
| US messages not delivered | 10DLC registration incomplete | Finish brand and campaign registration |
| No messages send | No SMS credits in Brevo | Top up SMS credits |
| Contact not receiving | No SMS consent synced | Confirm consent at checkout |
Related Articles
- Collect SMS and WhatsApp consent
- WhatsApp template approval
- Build a post-purchase flow
- Connect Tajo to Shopify
Get Help
- Live Chat: available in the Tajo dashboard (bottom right)
- Email Support: [email protected]
- Documentation: docs.tajo.io