Very simple Human in the loop system email with AI e IMAP
Automate your email response process with human oversight and AI assistance using this Very simple Human in the loop system email with AI e IMAP workflow. This n8n workflow monitors your IMAP inbox for incoming emails, then leverages OpenAI to intelligently summarize the email content and draft a preliminary response. The workflow begins with an Email Trigger (IMAP) node that fetches new emails, passing their content to a Markdown node for initial processing before an Email Summarization Chain (AI:chainSummarization) powered by OpenAI (AI:lmChatOpenAi) distills the key information. An AI:agent node then uses this summary to Write email, generating a draft response. This draft is then sent to a human for review via an Approve Email (emailSend) node. Once approved, the final email is dispatched using the Send Email node. This system is ideal for marketing teams, customer support, or any business needing to efficiently manage incoming communications while ensuring quality and brand voice through human review. It significantly reduces the time spent on drafting routine email responses, allowing teams to focus on more complex tasks and ensuring timely, well-crafted communication without the overhead of constant manual intervention.
Workflow JSON
{"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": "", "name": "[Your imap]"}}, "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": "", "name": "[Your smtp]"}}, "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": "", "name": "[Your openAiApi]"}}, "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": "", "name": "[Your smtp]"}}, "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": "", "name": "[Your openAiApi]"}}, "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 Import This Workflow
- 1Copy the workflow JSON above using the Copy Workflow JSON button.
- 2Open your n8n instance and go to Workflows.
- 3Click Import from JSON and paste the copied workflow.
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