Tomba email verification with BillionVerify
Tomba is a sales prospecting tool that finds and enriches business email addresses from company domains and LinkedIn profiles. Adding BillionVerify to your Tomba workflow gives you a second layer of confidence, confirming each discovered address is live and safe to contact before it enters your outreach sequences.
Why verify before the send
Email finders surface addresses that were valid at time of indexing but may have since been deactivated, reassigned, or turned into catch-alls. Verifying Tomba results with BillionVerify removes stale addresses before they inflate your bounce rate and hurt your sending domain's reputation.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Tomba sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Tomba + 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 Tomba contacts",
"message": "Replace this Gmail send with your Tomba 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 Tomba
Ready-to-use workflows that verify emails before Tomba sends.
How it works
- 1
Trigger your workflow when Tomba returns a new email address or a batch export is ready.
- 2
Send each discovered address to BillionVerify via the n8n community node or the REST API.
- 3
Receive a detailed verdict: valid, invalid, disposable, catch-all, or role-based.
- 4
Filter out addresses below your acceptance threshold and pass the clean set to your CRM or sequencer.
- 5
Maintain a low bounce rate and protect your sending domain as you scale prospecting volume.
When to use this
Scrub prospecting exports before outreach
After exporting a batch of leads from Tomba, run the list through BillionVerify to eliminate undeliverable and risky addresses, so every sales email you send goes to a mailbox that exists.
Enrich and verify in a single pipeline
Chain Tomba's discovery step with BillionVerify in n8n or Integrately: find emails first, then verify them automatically, delivering a clean, enriched lead list ready for CRM import.
FAQ
Why should I verify emails found by Tomba?
Tomba's index is regularly updated but cannot guarantee real-time deliverability. BillionVerify does live SMTP checks and disposable-address detection to confirm each address is actually reachable today.
How does BillionVerify handle catch-all domains?
Catch-all servers accept all incoming mail, making it impossible to confirm delivery without sending. BillionVerify flags these separately so you can decide whether to contact them or skip them.
Can I automate the Tomba-to-BillionVerify pipeline?
Yes. Use Integrately for a no-code 1-click connection, the n8n community node for custom logic, or call the BillionVerify REST API directly from any automation environment.
Verify emails in Tomba
Create a free account, grab your API key, and stop bounces before they happen.
Get started free