Automatically categorize Gmail messages with GPT-4 mini classification

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Important notice

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

1. Workflow Overview

️ Smart Email Classifier Workflow Intelligent AI powered email classification system that automatically sorts incoming Gmail messages into Business, Meetings, Cold Emails, and other categories us...

Best for

AI Summarization automation workflows
Multimodal AI automation workflows
intermediate n8n builders looking for reusable templates

Tools used

n8n-nodes-base.gmailtrigger, @n8n/n8n-nodes-langchain.textclassifier, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.noop, n8n-nodes-base.gmail, 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 Ilyass Kanissi.

Original n8n.io source

1.1 Workflow description

Title: Automatically categorize Gmail messages with GPT-4 mini classification
Workflow name: Automatically categorize Gmail messages with GPT-4 mini classification

🛠️ Smart Email Classifier Workflow

Intelligent AI-powered email classification system that automatically sorts incoming Gmail messages into Business, Meetings, Cold Emails, and other categories using OpenAI.

⚡ Quick Setup

Import this workflow into your n8n instance
Setup your OpenAI credentials at: OpenAI api key
Configure your Gmail credentials and you're ready to go: Google Cloud Console
Activate the workflow to start automatic email classification

🔧 How it Works

Gmail Trigger: Monitors incoming emails in real-time
Text Classifier: AI-powered categorization using OpenAI Chat Model
Smart Routing: Automatically sorts emails into predefined categories
Gmail Integration: Adds appropriate labels and organizes emails automatically
Fallback Handling: "No Operation" path for unclassifiable emails

Every email gets intelligently sorted into:

🏢 Business

Work-related correspondence
Client communications
Project updates

📅 Meetings

Meeting invitations and requests
Calendar-related emails
Scheduling communications

❄️ Cold Emails

Sales outreach and pitches
Unsolicited business proposals
Marketing communications

🔀 Random

Personal emails
Newsletters
Miscellaneous content

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 Trigger

Type / Role: n8n-nodes-base.gmailTrigger - gmailTrigger
Config choices: Version 1.3

Block 2 - Text Classifier

Type / Role: @n8n/n8n-nodes-langchain.textClassifier - textClassifier
Config choices: Version 1.1

Block 3 - OpenAI Chat Model

Type / Role: @n8n/n8n-nodes-langchain.lmChatOpenAi - lmChatOpenAi
Config choices: Version 1.2

Block 4 - No Operation, do nothing

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

Block 5 - Business

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

Block 6 - Cold Emails

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

Block 7 - Meetings

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

Block 8 - Sticky Note

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

3. Summary Table

Workflow	Automatically categorize Gmail messages with GPT-4 mini classification
Complexity	intermediate
Nodes	8
Categories	AI Summarization, Multimodal AI
Author	Ilyass Kanissi
Published	19 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7599/7599.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 AI Summarization workflows Multimodal AI workflows

Frequently asked questions

What does Automatically categorize Gmail messages with GPT-4 mini classification 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 AI Summarization, Multimodal AI use case.

Ilyass Kanissi

4 workflows

Nodes

n8n-nodes-base.gmailtrigger @n8n/n8n-nodes-langchain.textclassifier @n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.noop n8n-nodes-base.gmail n8n-nodes-base.stickynote

Complexity

intermediate

Published 19 Aug 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/7599/7599.json

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Automatically categorize Gmail messages with GPT-4 mini classification

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

🛠️ Smart Email Classifier Workflow

⚡ Quick Setup

🔧 How it Works

🏢 Business

📅 Meetings

❄️ Cold Emails

🔀 Random

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Gmail Trigger

Block 2 - Text Classifier

Block 3 - OpenAI Chat Model

Block 4 - No Operation, do nothing

Block 5 - Business

Block 6 - Cold Emails

Block 7 - Meetings

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