Fathom email verification with BillionVerify
Fathom is a privacy-focused web analytics platform that gives teams clean, actionable traffic data without invasive tracking. When Fathom insights feed into email outreach or newsletter workflows, the email addresses involved need to be valid. BillionVerify pairs with Fathom-driven campaigns to ensure contacts are reachable before any message is sent.
Why verify before the send
Analytics tools surface which content resonates and which audiences engage — but acting on those insights through email is only effective if the addresses you contact are real. Invalid, disposable, or catch-all emails waste sends, inflate your bounce rate, and erode the inbox placement that makes email a valuable channel alongside your Fathom data.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Fathom sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Fathom + 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 Fathom contacts",
"message": "Replace this Gmail send with your Fathom 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 Fathom
Ready-to-use workflows that verify emails before Fathom sends.
How it works
- 1
Set up a workflow in n8n or Integrately that connects your email capture source (triggered by Fathom-informed campaigns) to BillionVerify.
- 2
Pass each collected email address to the BillionVerify API for validation.
- 3
Receive a verdict covering validity, disposability, role-based status, and catch-all detection.
- 4
Route verified addresses into your active list and quarantine or discard invalid ones.
- 5
Review verification trends to correlate list quality with traffic sources reported in Fathom.
When to use this
Verify newsletter sign-ups driven by high-performing content
When Fathom shows a blog post or landing page generating strong conversions, verify those sign-up addresses with BillionVerify before adding them to your newsletter. This protects your list quality precisely when traffic spikes most.
Clean contact lists before re-engagement campaigns
Use Fathom engagement data to identify inactive segments, then run those email addresses through BillionVerify before sending re-engagement emails. Remove undeliverable contacts rather than risking bounces that hurt future deliverability.
FAQ
Fathom is an analytics tool — where does email verification fit in?
Fathom tells you which pages and campaigns drive conversions. Those conversions often include email sign-ups. Verifying those addresses with BillionVerify ensures the downstream email channel performs as well as your analytics suggest it should.
Can I automate verification without coding?
Yes. Integrately offers a 1-click connection between your email capture tool and BillionVerify, requiring no code. For more complex logic, the n8n community node and the REST API give you full flexibility.
What is a catch-all address and should I send to it?
A catch-all domain accepts mail for any address at that domain, whether or not the mailbox exists. BillionVerify flags these so you can decide to send cautiously, move them to a lower-priority segment, or skip them entirely.
Does BillionVerify store the email addresses I verify?
BillionVerify processes addresses for verification purposes. Review the BillionVerify privacy policy for full details on data handling, especially relevant if your audience expects privacy-first tooling aligned with Fathom's philosophy.
Verify emails in Fathom
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