Highlevel email verification with BillionVerify
HighLevel is an all-in-one marketing automation and CRM platform used by agencies and businesses to manage contacts, run email and SMS campaigns, and automate sales pipelines. BillionVerify integrates to validate contact emails at every entry point, protecting campaign deliverability across the entire platform.
Why verify before the send
HighLevel consolidates contacts from forms, funnels, and third-party imports, making it easy for invalid and disposable addresses to accumulate across multiple sub-accounts. Verifying emails before they enter workflows prevents bounce-driven domain penalties, ensures automations trigger only for reachable contacts, and keeps your agency's sending reputation strong across all client accounts.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Highlevel 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 Highlevel
Ready-to-use workflows that verify emails before Highlevel sends.
How it works
- 1
A contact enters HighLevel through a form, funnel, manual import, or third-party sync.
- 2
An n8n community node or Integrately action triggers a BillionVerify check on the submitted email address.
- 3
BillionVerify performs SMTP verification, disposable-domain detection, and role-address filtering.
- 4
Contacts with valid emails proceed into HighLevel workflows; those with risky addresses are tagged or excluded.
- 5
Email campaigns and automations run against a cleaner list, reducing bounces and preserving sender reputation.
When to use this
Validate funnel form submissions in real time
When a lead submits a HighLevel funnel form, pass the email to BillionVerify before the contact is created. This stops invalid addresses from entering nurture sequences and prevents automated follow-up emails from bouncing.
Clean imported contact lists before bulk campaigns
Before launching an email broadcast to a large HighLevel contact list, export the addresses, verify them in bulk via the BillionVerify REST API, and re-import only valid contacts. This protects your domain from high bounce rates on cold campaigns.
Verify leads across agency sub-accounts centrally
Set up a shared BillionVerify n8n workflow that validates inbound leads from all client sub-accounts. Standardize list quality for every agency client without manual effort per account.
FAQ
Can BillionVerify work across multiple HighLevel sub-accounts?
Yes. Build a central n8n workflow that receives webhooks from multiple sub-accounts and routes each email through BillionVerify. The verified result can be written back to the originating sub-account via the HighLevel API.
How does email verification protect my agency's sending domain?
High bounce rates signal to mailbox providers that you are sending to poor-quality lists. BillionVerify removes invalid addresses before they reach your campaigns, keeping bounce rates low and your domain reputation intact.
Does BillionVerify detect role addresses like support@ or noreply@?
Yes. Role addresses rarely belong to a real individual and often have poor engagement. BillionVerify flags them so you can decide whether to include them in your HighLevel contact workflows.
What integration methods are available for HighLevel?
You can use the BillionVerify n8n community node, a one-click Integrately automation, or call the BillionVerify REST API directly from a HighLevel custom webhook or external automation.
Verify emails in Highlevel
Create a free account, grab your API key, and stop bounces before they happen.
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