Mutasem This workflow corresponds to n8n.io template #2120 — we link there as the canonical source.
This workflow follows the Form Trigger → Gmail 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": [
{
"id": "74e0d9d8-9a05-4bf6-82a1-7c7c6b488ac7",
"name": "n8n Form Trigger",
"type": "n8n-nodes-base.formTrigger",
"position": [
380,
420
],
"parameters": {
"path": "0bf8840f-1cc4-46a9-86af-a3fa8da80608",
"options": {},
"formTitle": "Contact us",
"formFields": {
"values": [
{
"fieldLabel": "What's your business email?"
}
]
},
"formDescription": "We'll get back to you soon"
},
"typeVersion": 2
},
{
"id": "86956707-6a69-465e-b73e-e49bfb6fa252",
"name": "Check if the email is valid",
"type": "n8n-nodes-base.if",
"position": [
800,
420
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "54d84c8a-63ee-40ed-8fb2-301fff0194ba",
"operator": {
"name": "filter.operator.equals",
"type": "string",
"operation": "equals"
},
"leftValue": "={{ $json.status }}",
"rightValue": "valid"
}
]
}
},
"typeVersion": 2
},
{
"id": "15991bbc-77c7-405f-8d8d-aeb5693b8eed",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
380,
220
],
"parameters": {
"color": 5,
"width": 547,
"height": 158,
"content": "### \ud83d\udc68\u200d\ud83c\udfa4 Setup\n1. Add you **MadKudu**, **Hunter**, and **Email** credentials \n2. Set the email where you want the alert\n3. Click the Test Workflow button, enter your email and check the Slack channel\n4. Activate the workflow and use the form trigger production URL to collect your leads in a smart way "
},
"typeVersion": 1
},
{
"id": "0a1d7df3-d536-4530-a3f1-d374bb645738",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
380,
560
],
"parameters": {
"color": 7,
"width": 162,
"height": 139,
"content": "\ud83d\udc46 You can exchange this with any form you like (*e.g. Typeform, Google forms, Survey Monkey...*)"
},
"typeVersion": 1
},
{
"id": "694b79a4-878e-4014-8975-8b81fa10f556",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
1360,
480
],
"parameters": {
"color": 7,
"width": 162,
"height": 84,
"content": "\ud83d\udc46 Adjust the fit as you see necessary"
},
"typeVersion": 1
},
{
"id": "e843b7e4-631a-4679-952e-3f4f3ef4592d",
"name": "Email is not valid, do nothing",
"type": "n8n-nodes-base.noOp",
"position": [
1140,
560
],
"parameters": {},
"typeVersion": 1
},
{
"id": "9e20efa9-add0-4109-8e83-67fd9ed6e2f9",
"name": "Score lead with MadKudu",
"type": "n8n-nodes-base.httpRequest",
"position": [
1140,
320
],
"parameters": {
"url": "=https://api.madkudu.com/v1/persons?email={{ $json.email }}",
"options": {},
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth"
},
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
},
"typeVersion": 4.1
},
{
"id": "1e0c1e73-b027-481c-a560-379e7c609b8e",
"name": "Verify email with Hunter",
"type": "n8n-nodes-base.hunter",
"position": [
600,
420
],
"parameters": {
"email": "={{ $json['What\\'s your business email?'] }}",
"operation": "emailVerifier"
},
"credentials": {
"hunterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "1769cddc-e479-4816-8807-b2c1a7cd72c3",
"name": "Not interesting enough",
"type": "n8n-nodes-base.noOp",
"position": [
1680,
460
],
"parameters": {},
"typeVersion": 1
},
{
"id": "f01ed0bd-e198-47d0-95de-cf15ff04be75",
"name": "if customer fit score > 60",
"type": "n8n-nodes-base.if",
"position": [
1380,
320
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "c23d7b34-a4ae-421f-bd7a-6a3ebb05aafe",
"operator": {
"type": "number",
"operation": "gt"
},
"leftValue": "={{ $json.properties.customer_fit.score }}",
"rightValue": 60
}
]
}
},
"typeVersion": 2
},
{
"id": "f500ad36-3f4c-4c3e-aadc-ab014be7cb7d",
"name": "Gmail",
"type": "n8n-nodes-base.gmail",
"position": [
1680,
160
],
"parameters": {
"sendTo": "user@example.com",
"message": "=Got a hot lead for you {{ $json.properties.first_name }} {{ $json.properties.last_name }} from {{ $json.company.properties.name }} ({{ $json.company.properties.domain }}) based out of {{ $json.company.properties.location.state }}, {{ $json.company.properties.location.country }}.\n\n\n{{ $('Score lead with MadKudu').item.json.properties.customer_fit.top_signals_formatted }}",
"options": {},
"subject": "=\u2b50 Hot lead alert: {{ $json.properties.first_name }} {{ $json.properties.last_name }}",
"emailType": "text"
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"typeVersion": 2.1
},
{
"id": "b47b0249-fa84-42b8-b7c5-0e204bc35db4",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
1640,
40
],
"parameters": {
"color": 7,
"width": 162,
"height": 84,
"content": "\ud83d\udc47\ud83c\udffd Update the email to send to"
},
"typeVersion": 1
}
],
"connections": {
"n8n Form Trigger": {
"main": [
[
{
"node": "Verify email with Hunter",
"type": "main",
"index": 0
}
]
]
},
"Score lead with MadKudu": {
"main": [
[
{
"node": "if customer fit score > 60",
"type": "main",
"index": 0
}
]
]
},
"Verify email with Hunter": {
"main": [
[
{
"node": "Check if the email is valid",
"type": "main",
"index": 0
}
]
]
},
"if customer fit score > 60": {
"main": [
[
{
"node": "Gmail",
"type": "main",
"index": 0
}
],
[
{
"node": "Not interesting enough",
"type": "main",
"index": 0
}
]
]
},
"Check if the email is valid": {
"main": [
[
{
"node": "Score lead with MadKudu",
"type": "main",
"index": 0
}
],
[
{
"node": "Email is not valid, do nothing",
"type": "main",
"index": 0
}
]
]
}
}
}
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.
gmailOAuth2httpHeaderAuthhunterApi
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About this workflow
If you have a form where potential leads reach out, then you probably want to analyze those leads and send a notification if certain requirements are met, e.g. employee number is high enough. MadKudu is built exactly to solve this problem. We use it along with Hunter and Gmail…
Source: https://n8n.io/workflows/2120/ — original creator credit. Request a take-down →
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