Automated cold email campaign with Google Sheets, email verification & SMTP

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Important notice

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

1. Workflow Overview

Use this template if you’re collecting leads in Google Sheets manually or automatically and need to send them emails daily using any personal or professional email provider. It’s simple yet effecti...

Best for

Lead Nurturing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.manualtrigger, n8n-nodes-base.stickynote, n8n-nodes-base.scheduletrigger, n8n-nodes-base.googlesheets, n8n-nodes-base.if, n8n-nodes-base.set, n8n-nodes-base.noop, n8n-nodes-base.hunter

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Automated cold email campaign with Google Sheets, email verification & SMTP
Workflow name: Automated cold email campaign with Google Sheets, email verification & SMTP

I’ve kept it easy so that anyone without technical or coding knowledge can still automate their emails and achieve excellent ROI. Setting up the workflow takes only 15 minutes.

How it works:

We connect Google Sheets with n8n to automatically fetch lead data. Google Sheets is used because it’s easy and widely accessible. Then, n8n sends emails daily at your scheduled times to the respective email addresses, using the subject lines and body text you've configured. It also verifies emails before sending.

It checks email availability, deliverability, and updates the Google Sheet/CRM with the respective fields.

Requirements:

A Google Sheet/Excel/CRM tools with leads (A sample Google Sheet link is provided in the template)
A working email account with SMTP information (SMTP info for the top 10 email providers is provided in the template)
API key from any email verification tool (We use the Hunter API key in our use case. You can find the link in the template.)

Setup Steps:

You need a Google Sheet where you're collecting leads. You can replace Google Sheets with your CRM tool. Connect it using your credentials.

Replace the manual trigger with a scheduled trigger to automate emails at your preferred time.

Replace the email verification tool/Hunter API with your own API key.

Add your SMTP credentials to connect the template with your preferred email provider. Using SMTP, you can send emails through Gmail, Outlook, Zoho, or any similar provider. This makes sending emails simple and cost-efficient.

Note: SMTP, which stands for Simple Mail Transfer Protocol, is a communication protocol used to send email messages between mail servers.

After sending the email, we update the Google Sheet with “Sent”; hence, the email is not sent again the next day.

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 - When clicking ‘Execute workflow’

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

Block 2 - Sticky Note2

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

Block 3 - Sticky Note3

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

Block 4 - Sticky Note4

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

Block 5 - Schedule Trigger at 9 AM

Type / Role: n8n-nodes-base.scheduleTrigger - scheduleTrigger
Config choices: Version 1.2

Block 6 - Lead Sheet - Get Rows from the sheet

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

Block 7 - Updating GSheet if Email Is "Sent"

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

Block 8 - Checker - If emails are verified or no?

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

Block 9 - Sticky Note5

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

Block 10 - Creating Field for Updating "Sent" in G Sheet1

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

Block 11 - No Operation, do nothing5

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

Block 12 - Email verification using Hunter

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

Block 13 - Checker - If Already "Sent" or not

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

Block 14 - Checker - If Lead's "Email" Field is empty?

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

Block 15 - No Operation, Do Nothing

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

Block 16 - No Operation, Do Nothing1

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

Block 17 - Sticky Note

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

Block 18 - Send email using SMTP

Type / Role: n8n-nodes-base.emailSend - emailSend
Config choices: Version 2.1

Block 19 - Sticky Note1

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

3. Summary Table

Workflow	Automated cold email campaign with Google Sheets, email verification & SMTP
Complexity	advanced
Nodes	19
Categories	Lead Nurturing
Author	Janak Patel
Published	01 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/6758/6758.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 Nurturing workflows

Frequently asked questions

What does Automated cold email campaign with Google Sheets, email verification & SMTP 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 Nurturing use case.

Janak Patel

2 workflows

Nodes

n8n-nodes-base.manualtrigger n8n-nodes-base.stickynote n8n-nodes-base.scheduletrigger n8n-nodes-base.googlesheets n8n-nodes-base.if n8n-nodes-base.set n8n-nodes-base.noop n8n-nodes-base.hunter

Complexity

advanced

Published 01 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/6758/6758.json

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Automated cold email campaign with Google Sheets, email verification & SMTP

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works:

Requirements:

Setup Steps:

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - When clicking ‘Execute workflow’

Block 2 - Sticky Note2

Block 3 - Sticky Note3

Block 4 - Sticky Note4

Block 5 - Schedule Trigger at 9 AM

Block 6 - Lead Sheet - Get Rows from the sheet

Block 7 - Updating GSheet if Email Is "Sent"

Block 8 - Checker - If emails are verified or no?

Block 9 - Sticky Note5

Block 10 - Creating Field for Updating "Sent" in G Sheet1

Block 11 - No Operation, do nothing5

Block 12 - Email verification using Hunter

Block 13 - Checker - If Already "Sent" or not

Block 14 - Checker - If Lead's "Email" Field is empty?

Block 15 - No Operation, Do Nothing

Block 16 - No Operation, Do Nothing1

Block 17 - Sticky Note

Block 18 - Send email using SMTP

Block 19 - Sticky Note1

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