Validate signup email addresses with DNS checks and Data Tables
Ready for 3.0Ready for 3.0. This template uses no nodes that n8n 3.0 removes. No removed nodes, versions or helpers found. Static check, last run 2026-10-19.
What this workflow does
This workflow has 16 nodes and runs when an HTTP POST request hits its webhook URL. It uses only n8n's built-in nodes.
How it runs
Trigger: When an HTTP POST request hits its webhook URL.
- Settings (Edit Fields (Set)): sets 6 fields: role_prefixes, free_providers, common_domains…
- Read The Address (Code): runs custom JavaScript code
- Look Up The MX Records (HTTP Request): calls an HTTP API
- Look Up The A Record (HTTP Request): calls an HTTP API
- Look Up DMARC (HTTP Request): calls an HTTP API
- Look Up SPF (HTTP Request): calls an HTTP API
- Ask Who Registered The Domain (HTTP Request): calls an HTTP API
- Fetch The Disposable List (HTTP Request): calls an HTTP API
- Everything Back (Merge): merges the data from its input branches
- Read The DNS Answers (Code): runs custom JavaScript code
…plus 5 more steps. See the full node list below.
Before you upgrade to n8n 3.0
Nothing in this workflow is removed in n8n 3.0, so it should import and run after the upgrade.
Nodes used (7)
- Webhook
n8n-nodes-base.webhook - Edit Fields (Set)
n8n-nodes-base.set - Code
n8n-nodes-base.code - HTTP Request
n8n-nodes-base.httpRequest - Merge
n8n-nodes-base.merge - Data table
n8n-nodes-base.dataTable - Respond to Webhook
n8n-nodes-base.respondToWebhook
From the author
Quick overview This workflow exposes a webhook that evaluates an email address at signup using Cloudflare DNS-over-HTTPS lookups, RDAP domain registration data, and a public disposable-domain blocklist, then returns an accept/review/reject verdict with…