AI-powered lead email classification & auto-reply with GPT-4o and Gmail

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Important notice

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

1. Workflow Overview

How it works This workflow automatically responds to incoming emails identified as potential leads using AI generated text. It connects to your email inbox via IMAP, classifies incoming messages wi...

Best for

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

Tools used

n8n-nodes-base.emailreadimap, n8n-nodes-base.filter, n8n-nodes-base.gmail, n8n-nodes-base.stickynote, @n8n/n8n-nodes-langchain.openai

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: AI-powered lead email classification & auto-reply with GPT-4o and Gmail
Workflow name: AI-powered lead email classification & auto-reply with GPT-4o and Gmail

How it works

This workflow automatically responds to incoming emails identified as potential leads using AI-generated text.
It connects to your email inbox via IMAP, classifies incoming messages with an AI model, filters out non-leads, and sends a personalized reply to relevant messages.

Steps

Email Trigger (IMAP): Watches your inbox for new emails in real time.
Is Lead? (Message Model): Uses AI to determine whether the sender is a lead.
Filter: Passes only lead emails to the next step.
Write Customized Reply (Message Model): Generates a personalized response using AI.
Get Message: Retrieves original email details to ensure correct threading.
Reply to Message: Sends the AI-generated reply to the sender.

Setup Instructions

Connect your IMAP Email credentials to the first node and set the folder to watch (e.g., INBOX).
In the "Filter leads" node, adjust the AI prompt to match your lead qualification criteria.
In the "Reply with customized message" node, edit the AI prompt to reflect your product, service, or business tone.
Connect your Gmail (or other email provider) credentials in the Get Message and Reply to Message nodes.
Test with a few sample emails before activating.

Requirements

IMAP-enabled email account (for receiving messages)
Gmail API access (or modify to your email provider)
OpenAI or other AI model credentials for message analysis and reply generation

This template is ready to use, with all steps documented inside sticky notes for easy customization.

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 - Email Trigger (IMAP)

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

Block 2 - Filter

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

Block 3 - Get Message

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

Block 4 - Reply to Message

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

Block 5 - Sticky Note

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

Block 6 - Sticky Note1

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

Block 7 - Sticky Note2

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

Block 8 - Sticky Note3

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

Block 9 - Sticky Note4

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

Block 10 - Sticky Note5

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

Block 11 - Filter leads

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1.8

Block 12 - Reply with customized message

Type / Role: @n8n/n8n-nodes-langchain.openAi - openAi
Config choices: Version 1.8

3. Summary Table

Workflow	AI-powered lead email classification & auto-reply with GPT-4o and Gmail
Complexity	intermediate
Nodes	12
Categories	AI Chatbot, Multimodal AI
Author	Rodrigo
Published	13 Aug 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/7330/7330.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 Chatbot workflows Multimodal AI workflows

Frequently asked questions

What does AI-powered lead email classification & auto-reply with GPT-4o and Gmail 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 Chatbot, Multimodal AI use case.

Rodrigo

3 workflows

Nodes

n8n-nodes-base.emailreadimap n8n-nodes-base.filter n8n-nodes-base.gmail n8n-nodes-base.stickynote @n8n/n8n-nodes-langchain.openai

Complexity

intermediate

Published 13 Aug 2025

Likes 0

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Install path: /data/workflows/7330/7330.json

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AI-powered lead email classification & auto-reply with GPT-4o and Gmail

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

How it works

Steps

Setup Instructions

Requirements

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Email Trigger (IMAP)

Block 2 - Filter

Block 3 - Get Message

Block 4 - Reply to Message

Block 5 - Sticky Note

Block 6 - Sticky Note1

Block 7 - Sticky Note2

Block 8 - Sticky Note3

Block 9 - Sticky Note4

Block 10 - Sticky Note5

Block 11 - Filter leads

Block 12 - Reply with customized message

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