Collect new signups with a simple form, verify each email in real time, and add only valid contacts to a SendGrid list. Ideal for newsletters, gated content, and event signups. Keeps your mailing list clean without manual checks.

The flow is straightforward. A hosted form captures one required field, Email. The address is sent to Hunter using the email verifier action. A decision step reads the verification result and sends valid emails to SendGrid, saving them to a chosen list. If the result is not valid, the run ends with no further action, so bad addresses never enter your database. This protects your sender score, lowers bounce rates, and helps you reach more inboxes.

You will need Hunter and SendGrid accounts with API keys, plus a SendGrid list ready to receive contacts. Publish the form and share the link on your site, landing pages, or social profiles to grow signups. Many teams cut daily manual checks from close to an hour down to a few minutes, while improving list quality and reducing bounces. Common uses include newsletter capture, webinar registration, and lead magnet downloads where email quality matters.

• Hosted form trigger with a required Email field for fast capture.
• Real time email verification using Hunter’s email verifier action.
• Conditional routing that accepts only verified addresses and stops invalid ones.
• SendGrid contact creation mapped to a specific marketing list.
• No action path for invalid emails to avoid polluting your database.
• Simple field mapping that passes {{$json.Email}} through each step.

• Reduce manual email checks from 60 minutes a day to under 5 minutes
• Improve data quality by up to 80 percent by blocking invalid emails
• Lower bounce rates by up to 40 percent for new signups
• Automate 100 percent of capture and list entry for new contacts
• Connect verification and email marketing in one flow with no code

1. Import the template into n8n: Create a new workflow in n8n > Click the three dots menu > Select 'Import from File' > Choose the downloaded JSON file.
2. You'll need accounts with Hunter and SendGrid. See the Tools Required section above for links to create accounts with these services.
3. In the n8n credentials manager, create a new Hunter credential. Choose API Key, then visit your Hunter dashboard to create an API key and paste it into n8n. Give the credential a clear name like Hunter Production.
4. In the n8n credentials manager, create a new SendGrid credential. Generate an API key in your SendGrid dashboard with permissions for Marketing Campaigns and Contacts. Paste the key into n8n and name it clearly.
5. Open the Submit form node. Confirm the form title and description, and make sure the field Email is required. Save the node and copy the public form URL.
6. Open the Verify email node. Ensure the operation is Email Verifier and the Email field uses the expression {{$json.Email}} so it reads from the form input.
7. Open the Check if the email is valid node. Set the condition to check the Hunter response, for example result equals deliverable or score above your chosen threshold.
8. Open the Add contact to list node. Map the Email field to {{$json.Email}} and select your target SendGrid list from the dropdown. If needed, create a new list in SendGrid first.
9. Activate the workflow. Click Open form on the Submit form node and test with a valid email and a fake email to confirm the valid path and the no action path both work.
10. If contacts do not appear in SendGrid, check your API key scopes and confirm the selected list exists. If verification fails, check your Hunter credit usage and that the API key is active.
11. Share the form URL on your site or landing page. Monitor SendGrid bounces and list growth over the next week to confirm quality gains.