Authentica email verification with BillionVerify
Authentica is a developer tool for identity and authentication workflows. Pairing it with BillionVerify adds an email-quality layer to your authentication pipeline, ensuring that the addresses users register with are real, reachable, and free from disposable or fraudulent patterns.
Why verify before the send
Authentication systems that skip email validation become targets for fake account creation using throwaway addresses. BillionVerify gives Authentica-powered apps a lightweight but effective filter, blocking invalid and disposable addresses before they enter your identity store and cause downstream problems.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Authentica sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key. Adapted from this n8n template
Workflow templates with Authentica
Ready-to-use workflows that verify emails before Authentica sends.
How it works
- 1
Connect BillionVerify using the REST API or through an n8n workflow.
- 2
Trigger the verification step when a new user attempts to register via Authentica.
- 3
BillionVerify performs SMTP-level checks, disposable domain lookup, and catch-all detection.
- 4
Return the result to your workflow: allow registration for valid addresses, block or challenge invalid ones.
- 5
Log verification outcomes for audit trails and ongoing identity hygiene.
When to use this
Pre-Registration Email Check
Before a new identity is stored, call BillionVerify to confirm the supplied address is syntactically valid, exists at the mail server level, and isn't from a disposable provider.
Periodic Directory Hygiene
Run a scheduled workflow that pulls registered users and re-validates their emails with BillionVerify. Flag stale or undeliverable accounts for re-verification prompts or deactivation.
FAQ
Does BillionVerify send a confirmation email to the user?
No. BillionVerify silently checks the address using SMTP handshake and DNS lookups without ever sending a message, so the user experience is unaffected.
How accurate is disposable domain detection?
BillionVerify maintains a continuously updated list of known disposable and temporary email providers, catching the vast majority of throwaway addresses used in fake registrations.
Can I verify addresses in batches for existing users?
Yes. The BillionVerify bulk API accepts lists of addresses and returns structured results you can process to identify and act on problematic accounts.
Verify emails in Authentica
Create a free account, grab your API key, and stop bounces before they happen.
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