Human in the loop email response system (AI + IMAP)

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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 automates the process of handling incoming emails by: 1. Receiving emails via IMAP. 2. Converting the email to Markdown for better AI understanding. 3. Summarizing the em...

Best for

AI automation workflows
Lead Nurturing automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.emailreadimap, n8n-nodes-base.markdown, n8n-nodes-base.emailsend, @n8n/n8n-nodes-langchain.chainsummarization, @n8n/n8n-nodes-langchain.agent, @n8n/n8n-nodes-langchain.lmchatopenai, n8n-nodes-base.stickynote, n8n-nodes-base.set

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Human in the loop email response system (AI + IMAP)
Workflow name: Human in the loop email response system (AI + IMAP)

How it works

This workflow automates the process of handling incoming emails by:

Receiving emails via IMAP.
Converting the email to Markdown for better AI understanding.
Summarizing the email using an AI model.
Drafting a professional reply with AI, based on the summary.
Requesting human approval for the AI-generated response.
Sending the approved reply back to the original sender.

Set up steps

Estimated time: 10–20 minutes (excluding credential setup) What you’ll need:

IMAP credentials for your email inbox
SMTP credentials for sending emails
OpenAI (or compatible) API key for AI steps

Setup outline:

Add your IMAP and SMTP credentials to the workflow.
Connect your OpenAI (or compatible) account for AI summarization and reply generation.
Deploy the workflow in n8n and activate it.
Test by sending an email to your connected inbox.

Note: Detailed configuration tips and explanations are included as sticky notes inside the workflow for each step.

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 - Markdown

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

Block 3 - Send Email

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

Block 4 - Email Summarization Chain

Type / Role: @n8n/n8n-nodes-langchain.chainSummarization - chainSummarization
Config choices: Version 2

Block 5 - Write email

Type / Role: @n8n/n8n-nodes-langchain.agent - agent
Config choices: Version 1.7

Block 6 - OpenAI

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

Block 7 - Sticky Note2

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

Block 8 - Sticky Note5

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

Block 9 - Sticky Note1

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

Block 10 - Sticky Note7

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

Block 11 - Approve Email

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

Block 12 - OpenAI Chat Model

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

Block 13 - Set Email text

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

Block 14 - Sticky Note

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

Block 15 - Sticky Note11

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

Block 16 - Approved?

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

3. Summary Table

Workflow	Human in the loop email response system (AI + IMAP)
Complexity	advanced
Nodes	16
Categories	AI, Lead Nurturing
Author	Yatharth Chauhan
Published	17 Jul 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/6082/6082.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 workflows Lead Nurturing workflows

Frequently asked questions

What does Human in the loop email response system (AI + IMAP) 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, Lead Nurturing use case.

Yatharth Chauhan

2 workflows

Nodes

n8n-nodes-base.emailreadimap n8n-nodes-base.markdown n8n-nodes-base.emailsend @n8n/n8n-nodes-langchain.chainsummarization @n8n/n8n-nodes-langchain.agent @n8n/n8n-nodes-langchain.lmchatopenai n8n-nodes-base.stickynote n8n-nodes-base.set

Complexity

advanced

Published 17 Jul 2025

Likes 0

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Install path: /data/workflows/6082/6082.json

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Human in the loop email response system (AI + IMAP)

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Email Trigger (IMAP)

Block 2 - Markdown

Block 3 - Send Email

Block 4 - Email Summarization Chain

Block 5 - Write email

Block 6 - OpenAI

Block 7 - Sticky Note2

Block 8 - Sticky Note5

Block 9 - Sticky Note1

Block 10 - Sticky Note7

Block 11 - Approve Email

Block 12 - OpenAI Chat Model

Block 13 - Set Email text

Block 14 - Sticky Note

Block 15 - Sticky Note11

Block 16 - Approved?

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