Text a warm lead by SMS after a positive email reply

When a reply is labeled Interested and a phone number is on file, Master Inbox sends a short SMS from your Twilio number, and any text back lands in the same thread.

Calling

MI Inbox DialerFounderSDR managerRevenue plan

When

Add LabelInterested

Only if

Phone number is not empty

Then

Send an SMSShort note with your booking link, sent from the workspace number

Why teams run it

Positives that go quiet on email often answer a text.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Text a warm lead by SMS after a positive email reply.
Set the trigger to Add Label and choose Interested.
Add a condition: Phone number is not empty.
Add the action Send an SMS: Short note with your booking link, sent from the workspace number.
Save the workflow and switch it to Active.

Before you start, connect MI Inbox Dialer under Settings, Integrations.

Or create it with the API

Everything in the workflow builder is also in the Master Inbox API. This request creates the same workflow. Replace the example ids with your own label, list and campaign ids from GET /workflows/filter-fields. This workflow also uses conditions: add them under trigger_config.conditions, as shown on the conditions page.

curl -X POST https://api.masterinbox.com/api/api-webhook/v1/api/workflows/create-workflow \
  -H "Authorization: Bearer $MASTER_INBOX_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "name": "Text a warm lead by SMS after a positive email reply",
  "trigger_type": "add_label",
  "trigger_config": {
    "label_ids": [
      176479
    ]
  },
  "action_configs": [
    {
      "action_type": "twilio_send_sms"
    }
  ]
}'

Full reference: workflow API guide and API docs.

Or ask Claude, ChatGPT or Grok to build it

Our workflow guide is written for AI agents to read. Give your assistant your API key and this prompt:

Read https://app.masterinbox.com/public-workflow-api.md and use my Master Inbox API key to create this workflow: "Text a warm lead by SMS after a positive email reply". First call GET /workflows/filter-fields and look up my label, list and channel ids, then create the workflow and tell me what you set up.

Questions

Can I text people who replied to a cold email?

Consent rules differ by country. Check yours before you switch this on.

Where do replies to the text go?

Inbound texts are matched to the lead and logged on the same thread.

Can I build this workflow through the API?

Yes. Send the create-workflow request shown on this page with your Master Inbox API key. The API checks the payload first and lists every problem by field if anything is off.

Which plan includes this?

This workflow works on the Revenue plan. Every plan has unlimited users and starts with a free 7-day POC.