Drop a voicemail when a reply is tagged Interested

When a reply is labeled Interested and the lead has a phone number, the MI Inbox Dialer drops a prerecorded voicemail through your Twilio number, adding a second channel without rep time.

Calling

MI Inbox DialerSDR managerRevenue plan

When

Add LabelInterested

Only if

Phone number is not empty

Then

Drop a voicemailYour prerecorded voicemail from the workspace number

Why teams run it

A short voicemail next to the email reply makes the follow-up harder to ignore.

Set it up in Master Inbox

In Master Inbox, open Settings, then Workflows, and click Add a workflow.
Name it Drop a voicemail when a reply is tagged Interested.
Set the trigger to Add Label and choose Interested.
Add a condition: Phone number is not empty.
Add the action Drop a voicemail: Your prerecorded voicemail 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": "Drop a voicemail when a reply is tagged Interested",
  "trigger_type": "add_label",
  "trigger_config": {
    "label_ids": [
      176479
    ]
  },
  "action_configs": [
    {
      "action_type": "twilio_voicemail_drop"
    }
  ]
}'

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: "Drop a voicemail when a reply is tagged Interested". 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

Is this live?

The voicemail and SMS actions are in beta and run through your own Twilio account.

Do I need consent?

Check the calling and voicemail rules for each country you call before you switch this on.

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.