Automated email validation with Google Sheets, Hunter.io and EmailValidation.io

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

Best for

Lead Generation automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.googlesheetstrigger, n8n-nodes-base.httprequest, n8n-nodes-base.filter, n8n-nodes-base.set, n8n-nodes-base.googlesheets, n8n-nodes-base.hunter, n8n-nodes-base.stickynote

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Khair Ahammed.

Original n8n.io source

1.1 Workflow description

Title: Automated email validation with Google Sheets, Hunter.io and EmailValidation.io
Workflow name: Automated email validation with Google Sheets, Hunter.io and EmailValidation.io

Streamline your email list hygiene with this automated validation workflow that monitors Google Sheets for new email entries and instantly verifies their deliverability. Perfect for maintaining clean contact databases, reducing bounce rates, and ensuring successful email marketing campaigns.

Key Features

📊 Real-Time Processing

Monitors Google Sheets for new email entries every minute Automatic validation triggers when emails are added Instant deliverability status updates in the same spreadsheet

🔍 Dual Validation Sources

Hunter.io API for comprehensive email verification EmailValidation.io API as backup validation service Cross-verification for higher accuracy

✅ Smart Filtering

Skips empty email cells to prevent unnecessary API calls Processes only valid email formats Handles bulk email list uploads efficiently

📈 Seamless Integration

Updates original spreadsheet with validation results Preserves existing data while adding deliverability status No manual intervention required after setup

Workflow Components

Processing Flow:

Google Sheets Trigger monitors for new rows Filter removes empty email entries Email extraction and formatting Dual API validation (Hunter + EmailValidation.io) Status processing and formatting Automatic spreadsheet updates

Use Cases

Email Marketing: Clean lists before campaigns Lead Generation: Validate new prospect emails Database Maintenance: Regular email hygiene checks CRM Integration: Ensure contact data quality

Setup Requirements

Required:

Google Sheets with email column Hunter.io API key EmailValidation.io API key Google Sheets OAuth2 credentials

Benefits:

Reduce email bounce rates Improve sender reputation Save costs on invalid email sends Maintain clean contact databases

This workflow transforms manual email validation into an automated process, ensuring your email lists stay clean and deliverable without any manual effort. Tags: email-validation, google-sheets, hunter-io, data-cleaning, automation

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Google Sheets Trigger

Type / Role: n8n-nodes-base.googleSheetsTrigger - googleSheetsTrigger
Config choices: Version 1

Block 2 - Email Validation API

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 3 - Filter Empty Cells

Type / Role: n8n-nodes-base.filter - filter
Config choices: Version 2.2

Block 4 - Take Email Only

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 5 - Take Email and Validation Status

Type / Role: n8n-nodes-base.set - set
Config choices: Version 3.4

Block 6 - Update the Sheets with Validation Status

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4.6

Block 7 - Alternative - Hunter for Email Validation

Type / Role: n8n-nodes-base.hunter - hunter
Config choices: Version 1

Block 8 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

3. Summary Table

Workflow	Automated email validation with Google Sheets, Hunter.io and EmailValidation.io
Complexity	intermediate
Nodes	8
Categories	Lead Generation
Author	Khair Ahammed
Published	02 Sept 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/8198/8198.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Lead Generation workflows

Frequently asked questions

What does Automated email validation with Google Sheets, Hunter.io and EmailValidation.io do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Lead Generation use case.

Khair Ahammed

3 workflows

Nodes

n8n-nodes-base.googlesheetstrigger n8n-nodes-base.httprequest n8n-nodes-base.filter n8n-nodes-base.set n8n-nodes-base.googlesheets n8n-nodes-base.hunter n8n-nodes-base.stickynote

Complexity

intermediate

Published 02 Sept 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/8198/8198.json

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Automated email validation with Google Sheets, Hunter.io and EmailValidation.io

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Key Features

Workflow Components

Setup Requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Google Sheets Trigger

Block 2 - Email Validation API

Block 3 - Filter Empty Cells

Block 4 - Take Email Only

Block 5 - Take Email and Validation Status

Block 6 - Update the Sheets with Validation Status

Block 7 - Alternative - Hunter for Email Validation

Block 8 - Sticky Note

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions