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Google SheetsBillionVerifySendGrid

Verify newsletter signups before SendGrid (Webhook → SendGrid)

A newsletter signup hits a webhook, gets verified, and a deliverable subscriber receives the confirmation email via SendGrid.

Get a free API keyInstall the n8n node

Why verify before the send

Newsletter forms are a magnet for typos and bots. Sending confirmations to junk addresses drags down your open rates and SendGrid reputation, and inflates your subscriber count with dead weight.

The workflow

BillionVerify → SendGrid → Google Sheets — verification sits right before the send.

Webhook
billionverify
Verify Email
IF deliverable
sendgrid
Send confirmation
google-sheets
Store subscriber

Node by node

  1. 1
    WebhookTrigger· n8n

    Receives the signup payload from your newsletter form.

  2. 2
    Verify EmailVerify· billionverify

    The BillionVerify node, operation "Verify Email". Map its Email field to the address from the previous node. It returns status (valid / invalid / risky / catch-all / role / disposable), is_deliverable, a confidence score, and the reason — all before anything is sent.

  3. 3
    IF deliverableLogic· n8n

    Branches on the verification result. Condition: is_deliverable is true. The true branch continues to the send; the false branch skips the send and flags the contact.

  4. 4
    Send confirmationSend· sendgrid

    Sends the double opt-in confirmation via SendGrid for deliverable subscribers only.

  5. 5
    Store subscriberLogic· google-sheets

    Records the subscriber and verification status so your list stays clean and auditable.

When to use this

  • Newsletters and content sites with public signup forms.
  • Creators who pay per subscriber and want only real ones.
  • Anyone running double opt-in who wants to skip dead addresses.

Three ways to connect

n8n node

Install the BillionVerify community node and drop it into this workflow.

Integrately

1-Click connect BillionVerify with 1500+ apps, no code.

REST API

Call the verification API directly from any stack.

FAQ

Does this replace double opt-in?

No — it complements it. Verification filters out addresses that could never confirm, so your confirmation emails go only to real inboxes.

Can I plug this into Mailchimp or Beehiiv instead?

Yes. Replace the SendGrid node with your ESP; verify before the subscriber is added or emailed.

What about bot signups?

Disposable and invalid addresses are caught by verification, removing most bot and throwaway signups automatically.

Add verification to your workflow

Create a free account, grab your API key, and stop bounces before they happen.

Get started free