Email Verification in Zapier

You can add real-time email verification to any Zapier workflow without writing code. This tutorial uses Webhooks by Zapier to call the Mailbeam API and a Filter step to stop low-quality addresses before they reach your CRM, mailing list, or spreadsheet.

What you'll build

• A Zap that takes an email from any trigger (a form, a new lead, a signup)
• A webhook step that verifies the address with Mailbeam
• A filter that only lets valid, deliverable addresses continue

Prerequisites

• A Zapier account (Webhooks by Zapier requires a paid plan)
• A Mailbeam API key (sign up free)
• Any trigger app that provides an email address field

Step 1 — Start with an email-producing trigger

Create a new Zap and pick your trigger — for example Typeform → New Entry, Webflow → New Form Submission, or Facebook Lead Ads → New Lead. Complete the trigger setup and confirm the sample data includes an email field.

Step 2 — Add a "Webhooks by Zapier" action

Add an action step and choose Webhooks by Zapier → POST. Configure it like this:

In the Data section, add a key called email and map it to the trigger's email field using the field picker (the + icon).

Step 3 — Test the webhook

Click Test action. Zapier sends the request to Mailbeam and shows the JSON response, which looks like:

{
  "valid": true,
  "score": 94,
  "disposable": false,
  "catchAll": false,
  "mx": true,
  "reason": null,
  "latency_ms": 82
}

These fields — valid, score, disposable, and reason — become available to later steps as outputs of the webhook.

Step 4 — Add a Filter step

Add a Filter by Zapier step so the Zap only continues for good addresses. Set the conditions:

• valid (from the webhook) is true
• AND score (number) greater than or equal to 60
• AND disposable is false

If any condition fails, the Zap stops here and the rest of your workflow never runs for that record.

Step 5 — Continue your workflow

After the filter, add whatever action you want to run only for verified emails — for example Add Subscriber in Mailchimp, Create Contact in HubSpot, or Add Row in Google Sheets. Because the filter blocks bad addresses, only deliverable emails reach these steps.

A complete Zap looks like:

1. Trigger        — New Typeform entry
2. Webhooks       — POST email to Mailbeam /v1/verify
3. Filter         — valid = true AND score ≥ 60 AND disposable = false
4. Action         — Create contact in your CRM

Step 6 — Test end to end

Use Zapier's Test on each step with a real sample, then run the whole Zap with a known-bad address (try test@mailinator.com) and confirm the Filter stops it. Submit a valid address and confirm it flows through to your final action.

Best practices

Production checklist

• Filter conditions match your quality bar
• API key restricted to trusted Zap editors
• Email lowercased before sending (optional Formatter step)
• Final action only runs after the Filter
• Zap turned on and monitored in Zap History

Next steps

• API Reference — verify
• Bulk email verification for cleaning existing lists
• Authentication