Automate email categorization & response generation with Gmail & GPT-4

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Important notice

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

1. Workflow Overview

Gmail AI Email Manager Setup Guide Workflow Overview This workflow will create an intelligent Gmail email manager that can: Monitor incoming emails via webhook Analyze email content using AI Cat...

Best for

Ticket Management automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.gmail, n8n-nodes-base.openai, n8n-nodes-base.if, n8n-nodes-base.googlesheets, n8n-nodes-base.respondtowebhook, 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 Paul.

Original n8n.io source

1.1 Workflow description

Title: Automate email categorization & response generation with Gmail & GPT-4
Workflow name: Automate email categorization & response generation with Gmail & GPT-4

Gmail AI Email Manager - Setup Guide

🎯 Workflow Overview

This workflow will create an intelligent Gmail email manager that can:

Monitor incoming emails via webhook
Analyze email content using AI
Categorize emails automatically
Generate smart responses
Take actions based on email content
Send notifications for important emails

📋 Pre-Setup Checklist

Before we build the workflow, let me gather the necessary information and validate our approach.

Phase 1: Discovery & Planning

Search for Gmail nodes
Find AI analysis nodes
Identify webhook trigger options
Check notification nodes

Phase 2: Configuration Requirements

Gmail API credentials
AI service (OpenAI/Claude) API key
Webhook URL setup
Email classification rules

🔧 Setup Instructions

Step 1: Gmail API Setup

Go to Google Cloud Console
Create new project or select existing
Enable Gmail API
Create OAuth 2.0 credentials
Add authorized redirect URI: https://your-n8n-instance.com/rest/oauth2-credential/callback

Step 2: AI Service Setup

Choose one of the following:

OpenAI: Get API key from platform.openai.com
Claude: Get API key from console.anthropic.com
Local AI: Set up Ollama or similar

Step 3: n8n Credentials

Gmail OAuth2: Add client ID, secret, and scopes
AI Service: Add API key
Webhook: Configure webhook URL

Gmail AI Email Manager - Setup Guide

🔧 Quick Setup Checklist

1. Google Cloud Console

Enable Gmail API
Create OAuth2 credentials
Add redirect URI: https://your-n8n.com/rest/oauth2-credential/callback
Set up Gmail push notifications with Pub/Sub

2. API Keys

Get OpenAI API key from platform.openai.com
Create Google Sheets for logging (optional)

3. n8n Credentials

Gmail OAuth2: Client ID, Secret, Scopes: gmail.readonly,gmail.modify,gmail.compose
OpenAI API: Your API key

4. Gmail Labels (Create these)

URGENT (red)
IMPORTANT (orange)
PROMOTIONAL (purple)
PERSONAL (green)
WORK (blue)
SPAM (gray)

5. Update Workflow Values

High Priority Alert: Change notification email
Spreadsheet Log: Update sheet ID (if using)
Webhook: Copy URL after saving workflow

6. Test

Save & activate workflow
Send test email to Gmail
Check execution log
Verify auto-categorization works

That's it! Your AI email manager is ready! 🚀

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 - 📧 Gmail Webhook Trigger

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

Block 2 - 📩 Get Email Details

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2

Block 3 - 🤖 AI Email Analyzer

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

Block 4 - 🚦 Priority Router

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 5 - 🚨 High Priority Alert

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2

Block 6 - 🛡️ Spam Detector

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 7 - 🗑️ Move to Spam

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2

Block 8 - 💬 Auto-Reply Detector

Type / Role: n8n-nodes-base.if - if
Config choices: Version 2

Block 9 - 📝 Create Reply Draft

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2

Block 10 - 🏷️ Categorize Email

Type / Role: n8n-nodes-base.gmail - gmail
Config choices: Version 2

Block 11 - 📊 Log to Spreadsheet

Type / Role: n8n-nodes-base.googleSheets - googleSheets
Config choices: Version 4

Block 12 - ✅ Webhook Response

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

Block 13 - Sticky Note9

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

Block 14 - Sticky Note10

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

Block 15 - Sticky Note

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

3. Summary Table

Workflow	Automate email categorization & response generation with Gmail & GPT-4
Complexity	advanced
Nodes	15
Categories	Ticket Management, Multimodal AI
Author	Paul
Published	11 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7262/7262.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 Ticket Management workflows Multimodal AI workflows

Frequently asked questions

What does Automate email categorization & response generation with Gmail & GPT-4 do?

Gmail AI Email Manager Setup Guide Workflow Overview This workflow will create an intelligent Gmail email manager that can: Monitor incoming emails via webhook Analyze email content using AI Cat...

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 Ticket Management, Multimodal AI use case.

Paul

21 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.gmail n8n-nodes-base.openai n8n-nodes-base.if n8n-nodes-base.googlesheets n8n-nodes-base.respondtowebhook n8n-nodes-base.stickynote

Complexity

advanced

Published 11 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/7262/7262.json

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Automate email categorization & response generation with Gmail & GPT-4

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Gmail AI Email Manager - Setup Guide

🎯 Workflow Overview

📋 Pre-Setup Checklist

Phase 1: Discovery & Planning

Phase 2: Configuration Requirements

🔧 Setup Instructions

Step 1: Gmail API Setup

Step 2: AI Service Setup

Step 3: n8n Credentials

Gmail AI Email Manager - Setup Guide

🔧 Quick Setup Checklist

1. Google Cloud Console

2. API Keys

3. n8n Credentials

4. Gmail Labels (Create these)

5. Update Workflow Values

6. Test

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - 📧 Gmail Webhook Trigger

Block 2 - 📩 Get Email Details

Block 3 - 🤖 AI Email Analyzer

Block 4 - 🚦 Priority Router

Block 5 - 🚨 High Priority Alert

Block 6 - 🛡️ Spam Detector

Block 7 - 🗑️ Move to Spam

Block 8 - 💬 Auto-Reply Detector

Block 9 - 📝 Create Reply Draft

Block 10 - 🏷️ Categorize Email

Block 11 - 📊 Log to Spreadsheet

Block 12 - ✅ Webhook Response

Block 13 - Sticky Note9

Block 14 - Sticky Note10

Block 15 - 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