Dubb email verification with BillionVerify
Dubb is a video communication platform built for sales and marketing teams, letting users send personalized video messages to prospects and clients. Verifying recipient email addresses with BillionVerify before sending ensures your video messages land in real inboxes and your engagement metrics reflect genuine interest.
Why verify before the send
Sales outreach at scale means lists inevitably contain outdated, mistyped, or disposable addresses. A bounced video email not only wastes a personalized asset but also damages your sending domain's reputation. BillionVerify scrubs your contact lists so every Dubb video goes to someone who can actually watch it.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Dubb sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Dubb + 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 Dubb contacts",
"message": "Replace this Gmail send with your Dubb 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 Dubb
Ready-to-use workflows that verify emails before Dubb sends.
How it works
- 1
Connect BillionVerify to your workflow via the n8n community node, Integrately, or the REST API.
- 2
Trigger verification whenever a new contact enters your Dubb pipeline — from a form, CRM sync, or manual upload.
- 3
BillionVerify checks each address for validity, deliverability, disposable domains, and catch-all status.
- 4
Valid contacts proceed to your Dubb sequence; flagged addresses are routed to a review list.
- 5
Use BillionVerify's bulk verification for periodic list hygiene before major outreach campaigns.
When to use this
Validate prospects before video outreach
Before importing a prospect list into Dubb, run it through BillionVerify to remove invalid and risky addresses. Your video send quota is spent only on reachable contacts, improving reply rates and protecting deliverability.
Screen inbound leads before adding to Dubb sequences
When a lead fills out a form and triggers a Dubb video sequence, verify their email first. This prevents wasted personalized video creation for contacts who will never receive the message.
Clean CRM contacts synced to Dubb
CRM contact data degrades over time. Use BillionVerify to audit email addresses being synced from your CRM to Dubb, catching stale addresses before they inflate your bounce metrics.
FAQ
How does email verification improve video email ROI?
Every video email sent to an invalid address is a wasted effort. Verification ensures your personalized content reaches real people, which directly improves open rates, reply rates, and overall campaign ROI.
What happens to catch-all addresses in my Dubb lists?
Catch-all domains accept all messages at the server level but often discard them silently. BillionVerify flags these so you can decide whether to include them or deprioritize them in your sequences.
Can I verify addresses in bulk before importing to Dubb?
Yes. Upload your contact list to BillionVerify's bulk verification tool, download the cleaned list, then import only the verified contacts into Dubb.
Does BillionVerify integrate with Dubb directly?
The integration runs through n8n (using the BillionVerify community node), Integrately, or a custom REST API call — whichever fits your existing automation stack.
Verify emails in Dubb
Create a free account, grab your API key, and stop bounces before they happen.
Get started free