Justcall email verification with BillionVerify
JustCall is a cloud phone and SMS platform designed for sales and support teams to manage calls, texts, and contact outreach from one workspace. When email is part of your outreach sequences, verifying addresses in JustCall contact records ensures your email touches land in real inboxes alongside your voice and SMS efforts.
Why verify before the send
Sales outreach teams often build contact lists from multiple sources — imported CSVs, CRM syncs, and web forms — where email quality is inconsistent. Sending to bad addresses harms your domain reputation and skews open-rate metrics that guide coaching decisions. BillionVerify cleans those contacts before sequences run.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Justcall sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in JustCall + 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 JustCall contacts",
"message": "Replace this Gmail send with your JustCall 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 Justcall
Ready-to-use workflows that verify emails before Justcall sends.
How it works
- 1
Use n8n or Integrately to connect JustCall contact events to BillionVerify.
- 2
When a new contact is added or imported, extract the email and send it to BillionVerify for verification.
- 3
Receive a result covering deliverability, disposable detection, role-address identification, and catch-all status.
- 4
Update the contact record in JustCall with a verified or invalid tag based on the result.
- 5
Filter invalid-tagged contacts out of email-enabled outreach sequences before they launch.
When to use this
Contact import validation
Before uploading a new prospect list to JustCall, run the email column through BillionVerify. Invalid, disposable, and catch-all addresses are removed so your reps only reach out to contacts with working inboxes.
Multi-channel sequence hygiene
JustCall sequences that combine calls, SMS, and email need every channel to be reliable. BillionVerify ensures the email step in each sequence targets a verified address, preventing silent failures that make sequences appear less effective than they are.
FAQ
Does BillionVerify integrate directly with JustCall?
BillionVerify connects to JustCall via the n8n community node, Integrately's 1-click automation, or the REST API — giving you flexibility to fit verification into your existing workflow setup.
How does verifying emails improve my sales sequence performance?
Removing bad addresses reduces bounces and ensures open and reply rates reflect genuine engagement. Cleaner metrics lead to better coaching insights and more accurate outreach forecasting.
Can I verify emails for existing JustCall contacts in bulk?
Yes. Export your contact list, verify it in bulk via BillionVerify, then reimport the results as custom field tags or updated records to segment verified from unverified contacts.
Verify emails in Justcall
Create a free account, grab your API key, and stop bounces before they happen.
Get started free