Automated Email Optin Form with N8n and Hunter IO for Verification

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 →

{
  "id": "1blBTEfOEjamDB0N",
  "meta": {
    "templateCredsSetupCompleted": true
  },
  "name": "Email form",
  "tags": [],
  "nodes": [
    {
      "id": "0994dde9-bad8-49b8-b164-1f191decf9ff",
      "name": "Email is not valid, do nothing",
      "type": "n8n-nodes-base.noOp",
      "position": [
        940,
        480
      ],
      "parameters": {},
      "typeVersion": 1
    },
    {
      "id": "b27e140e-7758-42d4-bf07-39b17f85fc82",
      "name": "Check if the email is valid",
      "type": "n8n-nodes-base.if",
      "position": [
        620,
        260
      ],
      "parameters": {
        "options": {},
        "conditions": {
          "options": {
            "version": 1,
            "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": "a691af9a-f66f-4fd1-ab82-3d3450098d67",
      "name": "Verify email",
      "type": "n8n-nodes-base.hunter",
      "position": [
        360,
        260
      ],
      "parameters": {
        "email": "={{ $json.Email }}",
        "operation": "emailVerifier"
      },
      "credentials": {
        "hunterApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "cfe4d91b-209c-49df-8483-141f5e27fba2",
      "name": "Submit form",
      "type": "n8n-nodes-base.formTrigger",
      "position": [
        80,
        260
      ],
      "parameters": {
        "options": {},
        "formTitle": "Join my mailing list now",
        "formFields": {
          "values": [
            {
              "fieldLabel": "Email",
              "requiredField": true
            }
          ]
        },
        "formDescription": "10x your productivity with my A.I. tips. I'll cut the B.S. and give you the most practical tips for A.I. automation."
      },
      "typeVersion": 2.2
    },
    {
      "id": "30d816d9-7a91-47b2-8c06-da0b9114f375",
      "name": "Add contact to list",
      "type": "n8n-nodes-base.sendGrid",
      "position": [
        940,
        240
      ],
      "parameters": {
        "email": "={{ $json.Email }}",
        "resource": "contact",
        "additionalFields": {
          "listIdsUi": {
            "listIdValues": {
              "listIds": [
                "11a55438-d4a8-4740-b054-d273359b7dfe"
              ]
            }
          }
        }
      },
      "credentials": {
        "sendGridApi": {
          "name": "<your credential>"
        }
      },
      "typeVersion": 1
    },
    {
      "id": "e80255c8-25b2-48d5-8605-d7702cbf7bc7",
      "name": "Sticky Note1",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        60,
        -100
      ],
      "parameters": {
        "width": 505,
        "height": 180,
        "content": "## Automate Email List Building with n8n and Hunter io\n\n\ud83d\udca1 Read the [case study here](https://rumjahn.com/create-email-capture-forms-for-free-using-n8n-and-sendgrid-and-easily-grow-your-subscriber-list/).\n\n\ud83d\udcfa Watch the [youtube tutorial here](https://www.youtube.com/watch?v=NgvEHwu19Rs&t=2s)\n\n"
      },
      "typeVersion": 1
    },
    {
      "id": "f989d552-81b9-4ee7-aa28-a006b703280f",
      "name": "Sticky Note",
      "type": "n8n-nodes-base.stickyNote",
      "position": [
        300,
        100
      ],
      "parameters": {
        "color": 4,
        "height": 320,
        "content": "## Hunter io\n\nYou need to get a Hunter.io account and input the API key. There's 50 free credits per month."
      },
      "typeVersion": 1
    }
  ],
  "active": true,
  "settings": {
    "executionOrder": "v1"
  },
  "versionId": "1df322f8-6d69-4ae7-b094-3f0dec019d3b",
  "connections": {
    "Submit form": {
      "main": [
        [
          {
            "node": "Verify email",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Verify email": {
      "main": [
        [
          {
            "node": "Check if the email is valid",
            "type": "main",
            "index": 0
          }
        ]
      ]
    },
    "Check if the email is valid": {
      "main": [
        [
          {
            "node": "Add contact to list",
            "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.

• hunterApi
• sendGridApi

About this workflow

Want to collect email subscribers without paying expensive monthly fees? 💰 This workflow creates a free email collection system with built-in email verification to ensure you only collect legitimate email addresses! ✨

Source: https://n8n.io/workflows/2709/ — original creator credit. Request a take-down →

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