Quentn email verification with BillionVerify
Quentn is a marketing automation platform built for small and mid-sized businesses, letting you build contact-based campaigns, lead nurturing sequences, and tagging workflows. Connecting BillionVerify before emails go out keeps your contact base clean, deliverable, and safe from bounce damage.
Why verify before the send
Marketing automation campaigns are only as good as the contacts behind them. Invalid, disposable, or catch-all addresses silently accumulate in Quentn and inflate bounce rates, which damages your sender reputation over time. BillionVerify screens every address so your campaigns reach real inboxes and your domain stays trusted.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Quentn sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Quentn + BillionVerify",
"nodes": [
{
"parameters": {},
"type": "n8n-nodes-base.manualTrigger",
"typeVersion": 1,
"position": [
240,
300
],
"name": "When clicking ‘Test workflow’"
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "email-field",
"name": "email",
"value": "jane@example.com",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
460,
300
],
"name": "Get contacts"
},
{
"parameters": {
"sendTo": "={{ $json.email }}",
"subject": "Message for Quentn contacts",
"message": "Replace this Gmail send with your Quentn node — only deliverable, verified contacts reach it.",
"options": {}
},
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
900,
300
],
"name": "Send email",
"webhookId": "",
"credentials": {
"gmailOAuth2": {
"id": "",
"name": "Gmail account"
}
}
},
{
"parameters": {
"operation": "verify",
"email": "={{ $json.email }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
540,
300
],
"name": "Verify Email (BillionVerify)",
"credentials": {
"billionVerifyApi": {
"id": "",
"name": "BillionVerify account"
}
}
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "loose"
},
"combinator": "and",
"conditions": [
{
"id": "is-deliverable",
"leftValue": "={{ $json.is_deliverable }}",
"rightValue": "",
"operator": {
"type": "boolean",
"operation": "true",
"singleValue": true
}
}
]
}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
720,
300
],
"name": "IF deliverable"
}
],
"connections": {
"When clicking ‘Test workflow’": {
"main": [
[
{
"node": "Get contacts",
"type": "main",
"index": 0
}
]
]
},
"Get contacts": {
"main": [
[
{
"node": "Verify Email (BillionVerify)",
"type": "main",
"index": 0
}
]
]
},
"Verify Email (BillionVerify)": {
"main": [
[
{
"node": "IF deliverable",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable": {
"main": [
[
{
"node": "Send email",
"type": "main",
"index": 0
}
],
[]
]
}
},
"settings": {
"executionOrder": "v1"
}
}Workflow templates with Quentn
Ready-to-use workflows that verify emails before Quentn sends.
How it works
- 1
Connect Quentn to BillionVerify using the n8n community node or the Integrately 1-click integration.
- 2
Trigger a verification call whenever a new contact is added to Quentn or a campaign is about to send.
- 3
BillionVerify checks the address for validity, disposability, role classification, and catch-all status.
- 4
The result is written back to the contact record as a tag or custom field inside Quentn.
- 5
Use Quentn's built-in conditions to skip or suppress sending to any address that did not pass verification.
When to use this
Validate new leads at the point of capture
Run every new Quentn contact through BillionVerify the moment they enter your funnel. Reject invalid and disposable addresses before they ever receive a campaign, keeping your list healthy from day one.
Clean an existing Quentn contact list
Bulk-verify your current Quentn contacts via the BillionVerify REST API. Tag verified, risky, and invalid records so you can segment campaigns to only deliverable addresses and pause outreach to the rest.
Filter catch-all and role addresses before sending
Catch-all and role-based addresses (info@, support@) often bounce or go unread. Verify them separately in Quentn automations and route them to a lower-priority list rather than your main campaign flow.
FAQ
How does BillionVerify connect to Quentn?
You can use the n8n community node to build a custom automation, the Integrately 1-click integration for a no-code setup, or call the BillionVerify REST API directly from any Quentn webhook or HTTP action.
What address types does BillionVerify catch?
BillionVerify detects invalid syntax, non-existent mailboxes, disposable email services, role-based addresses, and catch-all domains — the main sources of hard and soft bounces in marketing automation lists.
Will verifying contacts slow down my Quentn automations?
Single-address verification typically returns in under a second. For large list cleans you can use the bulk API endpoint and process results asynchronously so your automations are never blocked.
Can I verify contacts already inside Quentn, not just new ones?
Yes. Export your existing contacts, run them through the BillionVerify bulk API, and reimport the results as tags or fields. You can also trigger re-verification on a schedule using n8n or Integrately.
Verify emails in Quentn
Create a free account, grab your API key, and stop bounces before they happen.
Get started free