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Email Verifier

Bulk email verification with load-balanced rotation across 5 SMTP servers. Processes batches, verifies each email, writes back status and error details.

View on GitHub
workflowData OpsData OpsOutbound
Original
by Roheel Jain
Nodes

10

Triggers

1

Platform

n8n

Tech Stack
SMTP Verification
Google Sheets
Google Sheets
Load Balancer
HTTP API
Workflow

Loop Over Items

splitInBatches

Sheets

googleSheets

Webhook

webhook

Code

code

Code1

code

Wait4

wait

Google Sheets

googleSheets

Email Verifier

httpRequest

Email Verifier1

httpRequest

If

if

Mini Map
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How It Works

Automatically checks if thousands of email addresses are valid and deliverable before sending campaigns. Saves money on email marketing costs and protects your sender reputation by removing bad emails from your lists.

1

Upload your email list

Add your email addresses to a Google Sheets spreadsheet or trigger the verification through a web form. The system can handle large lists with thousands of emails.

2

Break into manageable batches

Your email list gets divided into smaller groups to ensure reliable processing and prevent overwhelming the verification servers.

3

Distribute verification requests

The system intelligently spreads your verification requests across multiple email servers to ensure fast, reliable results even with large lists.

4

Check each email address

Each email gets verified to confirm it exists and can receive messages. The system checks for typos, inactive accounts, and undeliverable addresses.

Attached Files
workflow.json
5

Wait between batches

Built-in delays between verification batches ensure the process runs smoothly without triggering rate limits or blocks.

6

Save results to your spreadsheet

Verification results get written back to your Google Sheet with clear status indicators showing which emails are valid, invalid, or risky to send to.

What You'll Need

Google SheetsEmail Verification Service
  • Google Sheets account with your email list
  • Email verification service account (like Hunter.io, ZeroBounce, or similar)
  • API credentials from your chosen email verification provider
  • Email list formatted with addresses in a single column

Estimated Cost per Run

USD 0.10 – 50.00 (Cost depends on list size. Most email verification services charge $0.001-$0.005 per email verified.)

This automation has 1 configurable setting you'll customize during setup.