Skip to main content

Validate & score leads with ZeroBounce AI before sending Gmail emails

Workflow preview

Workflow preview
100%
Validate & score leads with ZeroBounce AI before sending Gmail emails preview
Open on n8n.io

Important notice

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

1. Workflow Overview

ZeroBounce Email Validation, A.I Scoring & Sending with Gmail This workflow auto...

Best for

  • Lead Generation automation workflows
  • AI Summarization automation workflows
  • advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.gmail, n8n-nodes-base.googlesheetstrigger, n8n-nodes-base.switch, @zerobounce/n8n-nodes-zerobounce.zerobounce, n8n-nodes-base.googlesheets, n8n-nodes-base.if, n8n-nodes-base.set, 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 ZeroBounce.

Original n8n.io source

1.1 Workflow description

Title
Validate & score leads with ZeroBounce AI before sending Gmail emails
Workflow name
Validate & score leads with ZeroBounce AI before sending Gmail emails

ZeroBounce Email Validation, A.I Scoring & Sending with Gmail

This workflow automates the process of validating, scoring, and emailing leads from a Google Sheet. It ensures you only send emails to high-quality contacts, protecting your sender reputation.

🚀 How it Works

  1. Trigger: Watches a Google Sheet for new or updated rows (contacts).
  2. Validate: Uses ZeroBounce to check if the email address is valid.
    • If Invalid: Updates the sheet with the reason and marks "Emailed" as false.
  3. Score: If valid, uses ZeroBounce A.I. Scoring to grade the lead quality (0-10).
    • If Low/Medium Score (<9): Updates the sheet with the score and marks "Emailed" as false.
  4. Send: If the score is High (9-10), sends an email via Gmail.
  5. Update: Writes the final status back to the Google Sheet, preventing duplicate sends.

đź“‹ Setup Requirements

  • Google Sheet: A sheet with columns for Email, Validated, Scored, Score, Emailed, Reason, etc.
  • ZeroBounce Account: API Key for validation and scoring.
  • Gmail Account: Connected via OAuth2 to send emails.

đź’ˇ Key Features

  • Cost Efficient: Checks existing Validated and Scored columns to avoid re-processing contacts.
  • Risk Protection: Filters out valid but low-quality leads (e.g., catch-alls or low scores).
  • Status Tracking: Keeps your Google Sheet updated with rich data (Sub-status, Domain Age, etc.).

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 - Send a message

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

Block 2 - Google Sheets Trigger

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

Block 3 - Filter by score

Type / Role
n8n-nodes-base.switch - switch
Config choices
Version 3.3

Block 4 - Validate email

Type / Role
@zerobounce/n8n-nodes-zerobounce.zeroBounce - zeroBounce
Config choices
Version 1

Block 5 - Score email

Type / Role
@zerobounce/n8n-nodes-zerobounce.zeroBounce - zeroBounce
Config choices
Version 1

Block 6 - Add Scoring Results

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 7 - Add validation results

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 8 - Email is valid?

Type / Role
n8n-nodes-base.if - if
Config choices
Version 2.3

Block 9 - Validate?

Type / Role
n8n-nodes-base.if - if
Config choices
Version 2.3

Block 10 - Score?

Type / Role
n8n-nodes-base.if - if
Config choices
Version 2.3

Block 11 - Email?

Type / Role
n8n-nodes-base.if - if
Config choices
Version 2.3

Block 12 - Add Emailed = false

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 13 - Add Emailed = true

Type / Role
n8n-nodes-base.googleSheets - googleSheets
Config choices
Version 4.7

Block 14 - Not valid

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

Block 15 - Low score

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

Block 16 - Medium score

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

Block 17 - Sticky Note

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

3. Summary Table

Workflow Validate & score leads with ZeroBounce AI before sending Gmail emails
Complexity advanced
Nodes 17
Categories Lead Generation, AI Summarization
Author ZeroBounce
Published 17 Dec 2025

4. Reproducing the Workflow from Scratch

  1. 1. Download the workflow JSON

    Use the JSON export at /data/workflows/11902/11902.json as the source template for this automation.

  2. 2. Import the template into n8n

    Open n8n, import the downloaded JSON, and review each node before activating the workflow.

  3. 3. Configure credentials and variables

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

  4. 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. 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.

Frequently asked questions

What does Validate & score leads with ZeroBounce AI before sending Gmail emails do?

ZeroBounce Email Validation, A.I Scoring & Sending with Gmail This workflow auto...

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, AI Summarization use case.