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": "custom",
"cronExpression": "*/5 * * * *"
}
]
},
"filters": {
"readStatus": "unread"
}
},
"id": "f0dac76f-41ce-4c33-add9-0278701badaf",
"name": "Gmail Trigger",
"type": "n8n-nodes-base.gmailTrigger",
"typeVersion": 1,
"position": [
-2224,
32
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 1
},
"conditions": [
{
"id": "check-n8n-label",
"leftValue": "={{$json.labels.some(label => label.id.includes('n8n-processed')) }}",
"rightValue": "INBOX",
"operator": {
"type": "boolean",
"operation": "false",
"singleValue": true
}
}
],
"combinator": "and"
},
"options": {}
},
"id": "bac38f70-f0ab-43ae-b2a3-04dc17ee1f40",
"name": "Skip if Already Processed",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
-2000,
32
]
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "emailFrom",
"name": "emailFrom",
"value": "={{ $json.From }}",
"type": "string"
},
{
"id": "emailFromName",
"name": "emailFromName",
"value": "={{ $json.From }}",
"type": "string"
},
{
"id": "subject",
"name": "subject",
"value": "={{ $json.Subject }}",
"type": "string"
},
{
"id": "bodyPlain",
"name": "bodyPlain",
"value": "={{ ($json.text || $json.snippet || '').substring(0, 4000) }}",
"type": "string"
},
{
"id": "messageId",
"name": "messageId",
"value": "={{ $json.id }}",
"type": "string"
},
{
"id": "threadId",
"name": "threadId",
"value": "={{ $json.threadId }}",
"type": "string"
},
{
"id": "receivedAt",
"name": "receivedAt",
"value": "={{ $json.internalDate.toDateTime('ms') }}",
"type": "string"
}
]
},
"options": {}
},
"id": "1f2380bb-2533-4a25-acbb-1e389b461146",
"name": "Extract Email Fields",
"type": "n8n-nodes-base.set",
"typeVersion": 3.3,
"position": [
-1776,
32
]
},
{
"parameters": {
"modelId": {
"__rl": true,
"value": "gpt-4o-mini",
"mode": "list",
"cachedResultName": "GPT-4O-MINI"
},
"messages": {
"values": [
{
"content": "Jeste\u015b inteligentnym botem odpowiadaj\u0105cym na wiadomo\u015bci e-mail dla firmy \"Projekt na Cito\" (us\u0142ugi projektowania wn\u0119trz). \nTwoim zadaniem jest oceni\u0107, czy wiadomo\u015b\u0107 to zapytanie o ofert\u0119/us\u0142ugi biura projektowego, portfolio, wycen\u0119 lub inne kwestie zwi\u0105zane z cenami lub projektem, lub pro\u015bba dotyczy kontaktu telefonicznego, oznacz j\u0105 jako \"offer\", w przeciwnym razie je\u015bli widaomo\u015b\u0107 nie dotyczy zapytania zwi\u0105zanego z prowadzonym biznesem jako \"other\".\n\nODPOWIED\u0179 WY\u0141\u0104CZNIE W FORMACIE JSON (NIE DODAWAJ INNEGO TEKSTU). \nZWR\u00d3\u0106 OBIEKT Z POLAMI: \nlabel: \"offer\" (zapytanie ofertowe) lub \"other\" (inne) \n- confidence: liczba od 0 do 1 (pewno\u015b\u0107 klasyfikacji) \n- intent: kr\u00f3tki token opisuj\u0105cy intencj\u0119 (np. \"pricing_request\", \"portfolio_request\", \"meeting_request\", \"complaint\", \"spam\")\n- entities: lista fraz kluczowych z maila (np. [\"kuchnia\", \"\u0142azienka\", \"salon\"])\n- reason: 1-zdaniowe uzasadnienie klasyfikacji. \n\nPRZYK\u0141ADY: Email: \"Ile b\u0119dzie kosztowa\u0142o zaprojektowanie kuchni i \u0142azienki?\"\nOdpowied\u017a: \n{\"label\":\"offer\",\"confidence\":0.95,\"intent\":\"pricing_request\",\"entities\":[\"kuchnia\",\"\u0142azienka\"],\"reason\":\"bezpo\u015brednie pytanie o koszt zaprojektowania pomieszcze\u0144\"} \nEmail: \"Czy macie portfolio?\"\nOdpowied\u017a: {\"label\":\"offer\",\"confidence\":0.98,\"intent\":\"portfolio_request\",\"entities\":[\"portfolio\"],\"reason\":\"pro\u015bba o portfolio\"}\nEmail: \"Chc\u0119 um\u00f3wi\u0107 spotkanie z architektem\"\nOdpowied\u017a: {\"label\":\"offer\",\"confidence\":0.95,\"intent\":\"meeting_request\",\"entities\":[\"meeting\", \"architect\"],\"reason\":\"pro\u015bba o spotkanie z architektem\"}\nEmail: \"Interesuje mnie projekt ca\u0142ego mieszkania 60m2, ile to b\u0119dzie kosztowa\u0107?\"\nOdpowied\u017a: {\"label\":\"offer\",\"confidence\":0.98,\"intent\":\"pricing_request\",\"entities\":[\"mieszkanie\",\"60m2\"],\"reason\":\"pytanie o wycen\u0119 projektu mieszkania z podanym metra\u017cem\"}\nEmail: \"Dzie\u0144 dobry, mam psa i kota\"\nOdpowied\u017a: {\"label\":\"other\",\"confidence\":0.95,\"intent\":\"spam\",\"entities\":[],\"reason\":\"wiadomo\u015b\u0107 nie dotyczy us\u0142ug projektowych\"}",
"role": "assistant"
},
{
"content": "=Email subject: {{ $json.subject }}\nEmail body: {{ $json.bodyPlain }}"
}
]
},
"jsonOutput": true,
"options": {}
},
"id": "5f493157-c102-49cb-9c58-d0898af77c4d",
"name": "OpenAI Classify",
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 1.3,
"position": [
-1552,
32
],
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 1
},
"conditions": [
{
"id": "condition-label",
"leftValue": "={{ $json.message.content.label }}",
"rightValue": "offer",
"operator": {
"type": "string",
"operation": "equals"
}
},
{
"id": "condition-confidence",
"leftValue": "={{ $json.message.content.confidence }}",
"rightValue": 0.7,
"operator": {
"type": "number",
"operation": "gte"
}
}
],
"combinator": "and"
},
"options": {}
},
"id": "cec5bc8c-d341-40d7-bd75-20147fdb8809",
"name": "Is Offer Request?",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
-1200,
32
]
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "replyTo",
"name": "replyTo",
"value": "={{ $('Extract Email Fields').item.json.emailFrom }}",
"type": "string"
},
{
"id": "replySubject",
"name": "replySubject",
"value": "=Re: {{ $('Extract Email Fields').item.json.subject || 'Zapytanie' }} \u2014 Informacja o kalkulatorze oferty",
"type": "string"
},
{
"id": "replyBody",
"name": "replyBody",
"value": "=<p>\n Cze\u015b\u0107 {{ $json.emailFromName || 'Kliencie' }},\n </p>\n\n <p>\n Dzi\u0119kujemy za wiadomo\u015b\u0107 i zainteresowanie us\u0142ugami <strong>Projekt na Cito</strong>.\n </p>\n\n <p>\n Wygl\u0105da na to, \u017ce pytasz o wycen\u0119 projektu. Najszybszym sposobem uzyskania przybli\u017conej\n ceny jest nasz kalkulator oferty:\n <a href=\"https://projektnacito.com.pl\" target=\"_blank\" rel=\"noopener noreferrer\">\n https://projektnacito.com.pl\n </a>\n </p>\n\n <p>Wybierz odpowiedni pakiet i skonfiguruj go wed\u0142ug swoich potrzeb:</p>\n <ul>\n <li>\n <strong>Pakiet na Cito</strong> \u2013 szybki projekt zawieraj\u0105cy wszystko co niezb\u0119dne.\n </li>\n <li>\n <strong>Pakiet Premium</strong> \u2013 kompleksowy projekt z pe\u0142n\u0105 dokumentacj\u0105.\n </li>\n <li>\n <strong>Konsultacje</strong> \u2013 godzinne konsultacje z projektantem.\n </li>\n </ul>\n\n <p>Pozdrawiamy serdecznie,<br />\n Zesp\u00f3\u0142 Projekt na Cito</p>\n\n <hr />\n <p style=\"font-size: 12px; color: #777;\">\n Wiadomo\u015b\u0107 wys\u0142ana automatycznie\n </p>",
"type": "string"
},
{
"id": "threadId",
"name": "threadId",
"value": "={{ $('Extract Email Fields').item.json.threadId }}",
"type": "string"
},
{
"id": "messageId",
"name": "messageId",
"value": "={{ $('Extract Email Fields').item.json.messageId }}",
"type": "string"
}
]
},
"options": {}
},
"id": "e398836f-91ed-4d0e-a1e1-7f4cd0719c8e",
"name": "Prepare Auto Reply",
"type": "n8n-nodes-base.set",
"typeVersion": 3.3,
"position": [
-976,
-64
]
},
{
"parameters": {
"sendTo": "={{ $json.replyTo }}",
"subject": "={{ $json.replySubject }}",
"message": "={{ $json.replyBody }}",
"options": {
"appendAttribution": false,
"senderName": "Projekt na Cito",
"replyToSenderOnly": false
}
},
"id": "1937159f-3db5-44a9-b3f7-1935fbbc761b",
"name": "Send Auto Reply",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
-752,
-64
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "addLabels",
"messageId": "={{ $('Extract Email Fields').item.json.messageId }}",
"labelIds": [
"Label_1170604044697810115",
"Label_5333537222323505779"
]
},
"id": "985c8e1f-e1b5-4e18-9ae1-6feae3616b7a",
"name": "Add Label (Offer)",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
-528,
-64
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "markAsRead",
"messageId": "={{ $('Extract Email Fields').item.json.messageId }}"
},
"id": "88d27f17-1e1f-4ba6-a16a-7a3989a72f40",
"name": "Mark as Read (Offer)",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
-304,
-64
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "addLabels",
"messageId": "={{ $('Extract Email Fields').item.json.messageId }}",
"labelIds": [
"Label_5333537222323505779"
]
},
"id": "1b11f004-1612-400a-b12a-d1f2d3316b14",
"name": "Add Label (Other)",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
-976,
128
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
}
],
"connections": {
"Gmail Trigger": {
"main": [
[
{
"node": "Skip if Already Processed",
"type": "main",
"index": 0
}
]
]
},
"Skip if Already Processed": {
"main": [
[
{
"node": "Extract Email Fields",
"type": "main",
"index": 0
}
]
]
},
"Extract Email Fields": {
"main": [
[
{
"node": "OpenAI Classify",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Classify": {
"main": [
[
{
"node": "Is Offer Request?",
"type": "main",
"index": 0
}
]
]
},
"Is Offer Request?": {
"main": [
[
{
"node": "Prepare Auto Reply",
"type": "main",
"index": 0
}
],
[
{
"node": "Add Label (Other)",
"type": "main",
"index": 0
}
]
]
},
"Prepare Auto Reply": {
"main": [
[
{
"node": "Send Auto Reply",
"type": "main",
"index": 0
}
]
]
},
"Send Auto Reply": {
"main": [
[
{
"node": "Add Label (Offer)",
"type": "main",
"index": 0
}
]
]
},
"Add Label (Offer)": {
"main": [
[
{
"node": "Mark as Read (Offer)",
"type": "main",
"index": 0
}
]
]
},
"Add Label (Other)": {
"main": [
[]
]
}
},
"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.
gmailOAuth2openAiApi
Pro
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About this workflow
Email-Offer-Classifier-Workflow. Uses gmailTrigger, openAi, gmail. Event-driven trigger; 10 nodes.
Source: https://github.com/lukaszkotowski-git/projektnacito/blob/01dc2c392b77e6ed4e9bdee251c7ae6cbdaa719f/n8n/email-offer-classifier-workflow.json — original creator credit. Request a take-down →
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