1. Access the platform

    Log in to your IDXAddons account.

    From the main menu, open the Mailbox Power app.

  2. Introduction

    Use this integration to send IDX Broker leads to Mailbox Power and automate postcard campaigns.

    • New leads are delivered automatically via Webhooks once enabled.
    • Support for Mailbox Power itself is not provided here. For help, contact Mailbox Power support.
  3. Setup: API Key

    Go to Mailbox Power > Integrations & API and click “Access your Mailbox Power API key”.

    Click “Copy to clipboard” to copy your API key.

    In IDXAddons, open the Mailbox Power app, paste the key in the Mailbox Power API Key field, and click Save.

    After saving, your Mailbox Power groups will load automatically.

  4. Enable Automatic Webhook

    Copy the webhook code snippet from this location and paste it into IDX Sub Headers in your IDX Broker settings.

    Once saved, new IDX leads are registered in real time in Mailbox Power, in the group configured in the app (defaults to “All Contacts” if none is selected).

  5. Verify Contacts

    Confirm new contacts under Mailbox Contacts and the groups list.

  6. Manual Send (older leads only)

    Use this only for leads created before the webhook was enabled.

    Select the leads and click Send to Mailbox.

    Confirm the action by clicking Yes, Import. If no group is selected, leads go to All Contacts.

    Imported leads will appear under Mailbox Contacts.

    You can verify them inside Mailbox Power and send postcards.

  7. Manual: send IDX leads to a Mailbox Power group

    Select the destination group first. Then select the leads and click Send to Mailbox.

    Confirm the action and the selected group by clicking Yes, Import.

    Leads will be imported into the selected Mailbox Power group.