About this recipe
A recipe for A Very Simple Human In The Loop Email Response System Using Ai And Imap
Recipe Template
{
"id": "Nvn78tMRNnKji7Fg",
"meta": {
"instanceId": "a4bfc93e975ca233ac45ed7c9227d84cf5a2329310525917adaf3312e10d5462",
"templateCredsSetupCompleted": true
},
"name": "Very simple Human in the loop system email with AI e IMAP",
"tags": [],
"nodes": [
{
"id": "271bb16f-9b62-41d9-ab76-114cd7ba915a",
"name": "Email Trigger (IMAP)",
"type": "n8n-nodes-base.emailReadImap",
"position": [
-1300,
1340
],
"parameters": {
"options": []
},
"credentials": {
"imap": {
"id": "k31W9oGddl9pMDy4",
"name": "IMAP info@n3witalia.com"
}
},
"typeVersion": 2
},
{
"id": "42d150d8-d574-49f9-9c0e-71a2cdea3b79",
"name": "Markdown",
"type": "n8n-nodes-base.markdown",
"position": [
-1040,
1340
],
"parameters": {
"html": "={{ $json.textHtml }}",
"options": []
},
"typeVersion": 1
},
{
"id": "e9498a60-0078-4581-b269-7ff552f4047a",
"name": "Send Email",
"type": "n8n-nodes-base.emailSend",
"position": [
920,
1320
],
"webhookId": "a79ae1b4-648c-4cb4-b6cd-04ea3c1d9314",
"parameters": {
"html": "={{ $('Set Email text').item.json.email }}",
"options": [],
"subject": "=Re: {{ $('Email Trigger (IMAP)').item.json.subject }}",
"toEmail": "={{ $('Email Trigger (IMAP)').item.json.from }}",
"fromEmail": "={{ $('Email Trigger (IMAP)').item.json.to }}"
},
"credentials": {
"smtp": {
"id": "hRjP3XbDiIQqvi7x",
"name": "SMTP info@n3witalia.com"
}
},
"typeVersion": 2.1
},
{
"id": "ab9f6ac3-2095-44df-aeba-2eab96ecf425",
"name": "Email Summarization Chain",
"type": "@n8n\/n8n-nodes-langchain.chainSummarization",
"position": [
-780,
1340
],
"parameters": {
"options": {
"binaryDataKey": "={{ $json.data }}",
"summarizationMethodAndPrompts": {
"values": {
"prompt": "=Write a concise summary of the following in max 100 words:\n\n\"{{ $json.data }}\"\n\nDo not enter the total number of words used.",
"combineMapPrompt": "=Write a concise summary of the following in max 100 words:\n\n\"{{ $json.data }}\"\n\nDo not enter the total number of words used."
}
}
},
"operationMode": "nodeInputBinary"
},
"typeVersion": 2
},
{
"id": "86b7c3d0-e1f2-4e2f-b293-8042700d6816",
"name": "Write email",
"type": "@n8n\/n8n-nodes-langchain.agent",
"position": [
-340,
1340
],
"parameters": {
"text": "=Write the text to reply to the following email:\n\n{{ $json.response.text }}",
"options": {
"systemMessage": "You are an expert at answering emails. You need to answer them professionally based on the information you have. This is a business email. Be concise and never exceed 100 words. Only the body of the email, not create the subject"
},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.7
},
{
"id": "5d5a397f-f9c3-4691-afd0-9a6102679eac",
"name": "OpenAI",
"type": "@n8n\/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-400,
1560
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini",
"cachedResultName": "gpt-4o-mini"
},
"options": []
},
"credentials": {
"openAiApi": {
"id": "CDX6QM4gLYanh0P4",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "5b36a295-fda6-4174-9078-0a8ec57620d2",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-800,
1260
],
"parameters": {
"width": 320,
"height": 240,
"content": "Chain that summarizes the received email"
},
"typeVersion": 1
},
{
"id": "7110fe1f-0099-49aa-9095-96e733aa468f",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
-360,
1260
],
"parameters": {
"width": 340,
"height": 240,
"content": "Agent that retrieves business information from a vector database and processes the response"
},
"typeVersion": 1
},
{
"id": "e2bdbd64-3c37-4867-ae2c-0f6937d82b81",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1100,
1260
],
"parameters": {
"height": 240,
"content": "Convert email to Markdown format for better understanding of LLM models"
},
"typeVersion": 1
},
{
"id": "8ae5d216-5897-4c33-800a-27ff939b174a",
"name": "Sticky Note7",
"type": "n8n-nodes-base.stickyNote",
"position": [
620,
1300
],
"parameters": {
"height": 180,
"content": "If the feedback is OK send email"
},
"typeVersion": 1
},
{
"id": "4cfce63c-5931-45c5-99ca-eb85dca962b5",
"name": "Approve Email",
"type": "n8n-nodes-base.emailSend",
"position": [
380,
1340
],
"webhookId": "4f9f06e7-9b2b-4896-9b51-245972341d12",
"parameters": {
"message": "=<h3>MESSAGE<\/h3>\n{{ $('Email Trigger (IMAP)').item.json.textHtml }}\n\n<h3>AI RESPONSE<\/h3>\n{{ $json.email }}",
"options": [],
"subject": "=[Approval Required] {{ $('Email Trigger (IMAP)').item.json.subject }}",
"toEmail": "info@n3witalia.com",
"fromEmail": "info@n3witalia.com",
"operation": "sendAndWait"
},
"credentials": {
"smtp": {
"id": "hRjP3XbDiIQqvi7x",
"name": "SMTP info@n3witalia.com"
}
},
"typeVersion": 2.1
},
{
"id": "d6c8acd2-ebc1-4aaa-bfcc-cdb18fcc8715",
"name": "OpenAI Chat Model",
"type": "@n8n\/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-820,
1560
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "deepseek-chat",
"cachedResultName": "deepseek-chat"
},
"options": []
},
"credentials": {
"openAiApi": {
"id": "97Cz4cqyiy1RdcQL",
"name": "DeepSeek"
}
},
"typeVersion": 1.2
},
{
"id": "33bbedeb-129a-4e99-ab5a-9e0ec4456156",
"name": "Set Email text",
"type": "n8n-nodes-base.set",
"position": [
100,
1340
],
"parameters": {
"options": [],
"assignments": {
"assignments": [
{
"id": "35d7c303-42f4-4dd1-b41e-6eb087c23c3d",
"name": "email",
"type": "string",
"value": "={{ $json.output }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "2293e0e6-4f2a-4622-a610-64b65f34e1e5",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
320,
1300
],
"parameters": {
"height": 180,
"content": "Human in the loop"
},
"typeVersion": 1
},
{
"id": "510196ec-adaf-4e6c-aac0-8ca8b754438a",
"name": "Sticky Note11",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1100,
940
],
"parameters": {
"color": 3,
"width": 540,
"height": 260,
"content": "# How it works\nThis workflow automates the handling of incoming emails, summarizes their content, generates appropriate responses and validate it through send IMAP email with \"Human in the loop\" system. \n\nYou can quickly integrate Gmail and Outlook via the appropriate nodes"
},
"typeVersion": 1
},
{
"id": "c4c9157d-4d05-47a1-a5eb-63865e838d39",
"name": "Approved?",
"type": "n8n-nodes-base.if",
"position": [
680,
1340
],
"parameters": {
"options": [],
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "62e26bc5-1732-4699-a602-99490c7406fd",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
},
"leftValue": "={{ $json.data.approved }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
}
],
"active": false,
"pinData": [],
"settings": {
"executionOrder": "v1"
},
"versionId": "47e79286-00f4-48e8-a0d1-e0f56d9ba0d5",
"connections": {
"OpenAI": {
"ai_languageModel": [
[
{
"node": "Write email",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Markdown": {
"main": [
[
{
"node": "Email Summarization Chain",
"type": "main",
"index": 0
}
]
]
},
"Approved?": {
"main": [
[
{
"node": "Send Email",
"type": "main",
"index": 0
}
],
[]
]
},
"Write email": {
"main": [
[
{
"node": "Set Email text",
"type": "main",
"index": 0
}
]
]
},
"Approve Email": {
"main": [
[
{
"node": "Approved?",
"type": "main",
"index": 0
}
]
]
},
"Set Email text": {
"main": [
[
{
"node": "Approve Email",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "Email Summarization Chain",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Email Trigger (IMAP)": {
"main": [
[
{
"node": "Markdown",
"type": "main",
"index": 0
}
]
]
},
"Email Summarization Chain": {
"main": [
[
{
"node": "Write email",
"type": "main",
"index": 0
}
]
]
}
}
}How to Use an n8n Template
1
Create a New Workflow
Click "New Workflow" in your n8n dashboard to get started.
2
Copy & Paste Template
First, copy this template:
Click here to copy the JSON
.
Then, in n8n, click the three dots (···) → "Import from file" and paste the JSON code.
3
Customize the Nodes
Go through each node in the workflow to update inputs like spreadsheet IDs, email addresses, or message content. Adjust field mappings to match your data.
4
Grant Access
For nodes that connect to external apps (like Google Sheets or Slack), you'll need to grant access. Connect your accounts using OAuth or an API key and save the credentials in the node.
5
Test It
Run the workflow by clicking "Execute Node" for each step or "Run Once" for the whole thing. Check the right sidebar to inspect data and debug any errors (they'll show up in red).
6
Activate Workflow
Once everything works as expected, click the "Activate" toggle to turn your workflow on. You're all set!