This workflow follows the Gmail → Gmail Trigger recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"nodes": [
{
"parameters": {
"pollTimes": {
"item": [
{
"mode": "everyHour"
}
]
},
"simple": false,
"filters": {
"readStatus": "unread"
},
"options": {}
},
"type": "n8n-nodes-base.gmailTrigger",
"typeVersion": 1.2,
"position": [
-240,
48
],
"id": "01f2151f-fb91-4005-bff8-cb4aed149f7b",
"name": "Gmail Trigger",
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "reply",
"messageId": "={{ $('Mark a message as read').item.json.id }}",
"message": "<table width=\"100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" bgcolor=\"#f8f8f8\"> <tr> <td align=\"center\" style=\"padding: 30px 15px;\"> <table width=\"600\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\" bgcolor=\"#ffffff\" style=\"border-radius:8px; padding: 30px;\"> <tr> <td style=\"font-size:1.05em; color:#333; line-height:1.5;\"> <p style=\"margin-bottom:18px; font-size:1.05em;\"> <b>Thank you for replying.</b><br><br> Please download our Total Body Mobile Massage Amenity Service Proposal PDF attached to this email. After reading through the information, please click on the link at the end of the document, and it will take you to where you can view our full virtual proposal. We truly appreciate your interest, and look forward to working together with your community soon. </p> <p style=\"color:#444; font-size:0.98em; white-space:pre-line; margin-top:24px;\"> Lyndon S. <br>Total Body Mobile Massage \u2013 Outreach Team <br>Contact Email: tbmmoutreach@gmail.com <br>Company Website: www.totalbodymobilemassage.com </p> </td> </tr> </table> </td> </tr> </table>",
"options": {
"appendAttribution": false,
"attachmentsUi": {
"attachmentsBinary": [
{}
]
},
"senderName": "Lyndon S.",
"replyToSenderOnly": true
}
},
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
1200,
-64
],
"id": "edf5ec62-657f-4a55-8b77-46824cfe97af",
"name": "Reply to a message",
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "markAsRead",
"messageId": "={{ $('Gmail Trigger').item.json.id }}"
},
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
672,
-64
],
"id": "f858aaa3-4154-4c5e-9f20-8e9b1b2fe9e4",
"name": "Mark a message as read",
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "4cae3339-8dd6-4018-8cc7-cc6ef5622d58",
"leftValue": "={{ Object.keys($json).length > 0 }}",
"rightValue": "",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
480,
48
],
"id": "18fe524b-9dfa-4a53-b808-cbd846434aac",
"name": "If"
},
{
"parameters": {},
"type": "n8n-nodes-base.noOp",
"typeVersion": 1,
"position": [
672,
160
],
"id": "7a360c5a-c105-4ed9-878b-43a506de86cc",
"name": "No Operation, do nothing"
},
{
"parameters": {
"content": "# \ud83d\udd75\ud83c\udffb Email Auto-Reply Workflow\n\n## Flow\n1. **Gmail Trigger** \u2192 Poll unread emails every hour\n2. **Keyword Filter** \u2192 Extract reply text & match keywords\n3. **If Match Found** \u2192 Mark as read \u2192 Send reply \u2192 Update DB\n4. **No Match** \u2192 Do nothing\n\n## Keywords\nRetention, massage, luxury, lifestyle, bond, survey, etc.\n\n## Logic\n- Only processes top reply (strips quoted content)\n- Auto-reply: \"Thanks for Replying!\"\n- Updates `email_logs.replied = TRUE`",
"height": 544,
"width": 2272,
"color": 4
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-688,
-176
],
"id": "04018138-3ee5-4575-9dde-aa513c22620a",
"name": "Sticky Note"
},
{
"parameters": {
"operation": "update",
"tableId": "email_logs",
"filters": {
"conditions": [
{
"keyName": "thread_id",
"condition": "eq",
"keyValue": "={{ $json.threadId }}"
}
]
},
"fieldsUi": {
"fieldValues": [
{
"fieldId": "replied",
"fieldValue": "TRUE"
}
]
}
},
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
1392,
-64
],
"id": "e4d0e957-615d-484e-b189-8353658bd75a",
"name": "Update a row",
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"mode": "runOnceForEachItem",
"jsCode": "// Keywords for matching (supports single-word and multi-word phrases)\nconst keywords = $json.keywords;\n\n// Utility to escape regex metacharacters\nfunction escapeRegex(str) {\n return str.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\$&');\n}\n\n// Extract only the new reply content (stop at quoted content)\nfunction extractTopReply(text) {\n if (!text) return '';\n \n const lines = text.split(/\\r?\\n/);\n const replyLines = [];\n \n for (const line of lines) {\n const trimmed = line.trim();\n \n // Gmail patterns\n if (trimmed.startsWith('>') || // > quoted line\n /^On\\s+.*wrote:?\\s*$/i.test(trimmed) || // \"On ... wrote:\"\n /^On\\s+.*<.*@.*>.*wrote:?\\s*$/i.test(trimmed)) { // \"On ... <email> wrote:\"\n break;\n }\n \n // Outlook patterns\n if (/^-+Original Message-+/i.test(trimmed) || // -----Original Message-----\n /^From:\\s+.*@/i.test(trimmed) || // From: email@domain\n /^Sent:\\s+(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)/i.test(trimmed) || // Sent: Day, Date\n /^To:\\s+.*@/i.test(trimmed) || // To: email@domain\n /^Subject:\\s+/i.test(trimmed)) { // Subject: ...\n break;\n }\n \n // Apple Mail patterns\n if (/^Begin forwarded message:/i.test(trimmed) || // Begin forwarded message:\n /^Date:\\s+(Monday|Tuesday|Wednesday|Thursday|Friday|Saturday|Sunday)/i.test(trimmed)) { // Date: Day, Date\n break;\n }\n \n replyLines.push(line);\n }\n \n return replyLines.join('\\n').trim();\n}\n\n\n// ------------------ Precompute keyword structures ------------------\n\n// Single-word keywords set\nconst singleWordKeywords = new Set(\n keywords\n .filter(k => !/\\s/.test(k))\n .map(k => k.toLowerCase())\n);\n\n// Multi-word phrase keywords (lowercased)\nconst phraseKeywords = keywords\n .filter(k => /\\s/.test(k))\n .map(k => k.toLowerCase());\n\n// Precompile phrase regexes and organize by first word\nconst phraseMap = {}; // firstWord -> [ { phrase, re } ]\n\nfor (const phrase of phraseKeywords) {\n const parts = phrase.split(/\\s+/).map(escapeRegex);\n // strict: require whitespace between words in order\n const pattern = '\\\\b' + parts.join('\\\\s+') + '\\\\b';\n // If you want to allow punctuation/hyphens between phrase words (e.g., \"lease-longer\" or \"lease, longer\"), \n // replace the above line with:\n // const pattern = '\\\\b' + parts.join('[\\\\W_]+') + '\\\\b';\n\n const re = new RegExp(pattern, 'i'); // case-insensitive for safety\n const firstWord = phrase.split(/\\s+/)[0];\n\n if (!phraseMap[firstWord]) phraseMap[firstWord] = [];\n phraseMap[firstWord].push({ phrase, re });\n}\n\n\n// Find matched keywords (optimized)\nfunction findMatchedKeywords(text) {\n const lower = text.toLowerCase();\n\n // Tokenize into words: alphanumeric sequences\n const words = lower.match(/\\b[a-z0-9]+\\b/g) || [];\n const seen = new Set();\n const matched = [];\n\n // For avoiding repeated phrase regex tests when first word repeats\n const triedPhrases = new Set();\n\n // Single-word matching and candidate phrase matching by first word\n for (const word of words) {\n // single-word\n if (singleWordKeywords.has(word) && !seen.has(word)) {\n matched.push(word);\n seen.add(word);\n }\n\n // phrase candidates whose first word is this word\n if (phraseMap[word]) {\n for (const { phrase, re } of phraseMap[word]) {\n if (triedPhrases.has(phrase)) continue; // already tested\n triedPhrases.add(phrase);\n if (!seen.has(phrase) && re.test(lower)) {\n matched.push(phrase);\n seen.add(phrase);\n }\n }\n }\n }\n\n return matched;\n}\n\n// ------------------ Main processing ------------------\n\nconst rawText = ($('Gmail Trigger').item.json.text || '').toString();\nconst topReply = extractTopReply(rawText);\n\n// Skip if no meaningful reply content\nif (!topReply || topReply.length < 3) {\n return {};\n}\n\nconst matchedKeywords = findMatchedKeywords(topReply);\n\n// Only proceed if keywords found\nif (matchedKeywords.length === 0) {\n return {};\n}\n\n// Return processed result\nreturn {\n ...$json,\n replyText: topReply,\n matchedKeywords,\n primaryMatched: matchedKeywords[0]\n};\n"
},
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
304,
48
],
"id": "34f3f094-b858-4a59-955a-50f3a4e7060e",
"name": "Check for Keywords"
},
{
"parameters": {
"operation": "get",
"tableId": "campaign_progress",
"filters": {
"conditions": [
{
"keyName": "id",
"keyValue": "1"
}
]
}
},
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
848,
-64
],
"id": "3338f56d-c17d-4e63-accf-9eb9dca02a48",
"name": "Get PDF Url",
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"url": "={{ $json.pdf_url }}",
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1024,
-64
],
"id": "4e90386a-6261-43b7-9c32-6fb9b22fdf2b",
"name": "GET PDF"
},
{
"parameters": {
"operation": "getAll",
"tableId": "email_templates",
"returnAll": true,
"filterType": "none"
},
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
-64,
48
],
"id": "37406444-456b-4c31-9e5c-7bd81b268295",
"name": "Get many rows",
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"fieldsToAggregate": {
"fieldToAggregate": [
{
"fieldToAggregate": "keyword",
"renameField": true,
"outputFieldName": "keywords"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.aggregate",
"typeVersion": 1,
"position": [
112,
48
],
"id": "175c5d9e-b8dd-4d30-8bcd-d67e48839534",
"name": "Combine keywords into a list"
}
],
"connections": {
"Gmail Trigger": {
"main": [
[
{
"node": "Get many rows",
"type": "main",
"index": 0
}
]
]
},
"Reply to a message": {
"main": [
[
{
"node": "Update a row",
"type": "main",
"index": 0
}
]
]
},
"Mark a message as read": {
"main": [
[
{
"node": "Get PDF Url",
"type": "main",
"index": 0
}
]
]
},
"If": {
"main": [
[
{
"node": "Mark a message as read",
"type": "main",
"index": 0
}
],
[
{
"node": "No Operation, do nothing",
"type": "main",
"index": 0
}
]
]
},
"Check for Keywords": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"Get PDF Url": {
"main": [
[
{
"node": "GET PDF",
"type": "main",
"index": 0
}
]
]
},
"GET PDF": {
"main": [
[
{
"node": "Reply to a message",
"type": "main",
"index": 0
}
]
]
},
"Get many rows": {
"main": [
[
{
"node": "Combine keywords into a list",
"type": "main",
"index": 0
}
]
]
},
"Combine keywords into a list": {
"main": [
[
{
"node": "Check for Keywords",
"type": "main",
"index": 0
}
]
]
}
},
"meta": {
"templateCredsSetupCompleted": true
}
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
gmailOAuth2supabaseApi
Pro
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About this workflow
Monitor-Emails. Uses gmailTrigger, gmail, supabase, httpRequest. Event-driven trigger; 12 nodes.
Source: https://github.com/anas-farooq8/Realestate-Outreach/blob/main/workflows/Monitor-Emails.json — original creator credit. Request a take-down →
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