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 →
{
"name": "AI Email Classification with Verifiable Decision Receipts",
"nodes": [
{
"parameters": {
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
},
"simple": true,
"filters": {}
},
"id": "6d47370e-c573-4446-80f6-e95b0d6a0696",
"name": "Gmail Trigger",
"type": "n8n-nodes-base.gmailTrigger",
"typeVersion": 1.2,
"position": [
0,
300
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"modelId": {
"__rl": true,
"mode": "list",
"value": "gpt-4o",
"cachedResultName": "GPT-4O"
},
"messages": {
"values": [
{
"role": "system",
"content": "=You are an email triage AI. Classify the email and return JSON: {\"category\":\"SPAM|SUPPORT|SALES|OTHER\",\"is_spam\":true,\"reason\":\"...\"}."
},
{
"content": "=Classify this email. JSON only.\n\nFrom: {{ $json.from }}\nSubject: {{ $json.subject }}\nBody:\n{{ $json.snippet }}"
}
]
},
"jsonOutput": true,
"options": {}
},
"id": "b8aa05ce-d3be-4037-aee0-88566bc84244",
"name": "AI Email Classification",
"type": "@n8n/n8n-nodes-langchain.openAi",
"typeVersion": 2.1,
"position": [
220,
300
],
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "generateReceipt",
"agentName": "EmailTriageAgent",
"workflowName": "={{ $workflow.name }}",
"action": "={{ 'Classified email as ' + $json.message.content.category }}",
"decision": "={{ JSON.stringify($json.message.content) }}",
"additionalFields": {
"modelProvider": "openai",
"modelUsed": "gpt-4o-mini",
"decisionType": "classification",
"riskLevel": "low",
"humanReview": false,
"policies": "data-handling-v1",
"permissions": "email.classify",
"tags": "email, triage, automation"
}
},
"id": "88d06852-2438-49b1-8165-55893b621818",
"name": "Signatrust: Receipt",
"type": "n8n-nodes-signatrust.signatrust",
"typeVersion": 1,
"position": [
440,
300
],
"credentials": {
"signatrustApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose"
},
"conditions": [
{
"id": "73dcb603-bbca-4267-914e-2502e483dfbe",
"leftValue": "={{ $('AI Email Classification').item.json.message.content.is_spam }}",
"rightValue": "true",
"operator": {
"type": "boolean",
"operation": "true"
}
}
],
"combinator": "and"
},
"options": {}
},
"id": "7ff07fef-bb58-4d6b-9a0c-fab6daf2be2c",
"name": "IF Spam",
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
660,
300
]
},
{
"parameters": {
"operation": "addLabels",
"messageId": "={{ $('Gmail Trigger').item.json.id }}",
"labelIds": [
"SPAM"
]
},
"id": "aeded956-873d-4b48-85ff-b9e11ca8a6b7",
"name": "Move to Spam",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
880,
200
],
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {},
"id": "7afb7823-a4cc-4f6d-870d-7c5d337c69fc",
"name": "Keep in Inbox",
"type": "n8n-nodes-base.noOp",
"typeVersion": 1,
"position": [
880,
440
]
},
{
"parameters": {
"content": "## AI Email Classification + Signatrust\nEvery automated email classification is signed so that if a message is later disputed (e.g. wrongly marked spam) you have a verifiable record of the AI's decision.",
"height": 200,
"width": 430,
"color": 5
},
"id": "940e6c75-1e20-44b4-bfb0-3b87cf61dd17",
"name": "Sticky Note 48fe7c",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-40,
30
]
}
],
"connections": {
"Gmail Trigger": {
"main": [
[
{
"node": "AI Email Classification",
"type": "main",
"index": 0
}
]
]
},
"AI Email Classification": {
"main": [
[
{
"node": "Signatrust: Receipt",
"type": "main",
"index": 0
}
]
]
},
"Signatrust: Receipt": {
"main": [
[
{
"node": "IF Spam",
"type": "main",
"index": 0
}
]
]
},
"IF Spam": {
"main": [
[
{
"node": "Move to Spam",
"type": "main",
"index": 0
}
],
[
{
"node": "Keep in Inbox",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"tags": [
{
"name": "AI Email Classification \u2014 Email"
},
{
"name": "AI Email Classification \u2014 Triage"
},
{
"name": "Signatrust (5)"
},
{
"name": "AI Email Classification \u2014 AI"
}
],
"meta": {
"templateCredsSetupCompleted": false
},
"versionId": "8d9f7dc8-37cd-4f3e-879d-acfd38f176d2"
}
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.
gmailOAuth2openAiApisignatrustApi
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About this workflow
AI Email Classification with Verifiable Decision Receipts. Uses gmailTrigger, openAi, n8n-nodes-signatrust, gmail. Event-driven trigger; 7 nodes.
Source: https://github.com/abokenan444/n8n-signatrust-workflows/blob/main/workflows/05-ai-email-classification.json — original creator credit. Request a take-down →
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