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Zoom email verification with BillionVerify
Zoom is a widely used video communications platform for meetings, webinars, and virtual events. By integrating BillionVerify, you can verify registrant email addresses before webinar confirmations are sent, keeping your attendee lists accurate and your sending reputation intact.
Why verify before the send
Webinar and meeting registration forms are frequent targets for fake or disposable email signups that inflate headcount numbers and waste confirmation sends. Invalid addresses cause bounces, hurting the domain used to deliver joining links and reminders. BillionVerify validates registrant emails at the point of signup so only reachable participants receive communications.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Zoom sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key. Adapted from this n8n template
verify-emails-in-zoom.json
{
"name": "Form to meeting: Google Calendar, Zoom, Gmail & Slack booking automation + BillionVerify",
"nodes": [
{
"id": "3dd27b86-6e03-4595-a9fa-2fe3d1210611",
"name": "Google Forms Webhook1",
"type": "n8n-nodes-base.webhook",
"position": [
176,
208
],
"webhookId": "0c79affb-61ad-4802-8580-66c5856d66cf",
"parameters": {
"path": "google-forms-booking",
"options": {},
"httpMethod": "POST",
"responseMode": "lastNode"
},
"typeVersion": 2.1
},
{
"id": "957b6711-281f-4599-9962-84ebf221691a",
"name": "Merge Form Data1",
"type": "n8n-nodes-base.merge",
"position": [
496,
224
],
"parameters": {},
"typeVersion": 3.2
},
{
"id": "3b63fe73-a5e7-4f3e-bf61-e7bd0a9aa63c",
"name": "Workflow Configuration1",
"type": "n8n-nodes-base.set",
"position": [
848,
224
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "id-1",
"name": "calendarId",
"type": "string",
"value": "user@example.com"
},
{
"id": "id-2",
"name": "slackChannel",
"type": "string",
"value": "C09GN4NCTAP"
},
{
"id": "id-3",
"name": "teammateEmail",
"type": "string",
"value": "user@example.com"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "66b2895b-8260-4e40-b4ec-39b100b89f77",
"name": "Extract Booking Details1",
"type": "n8n-nodes-base.set",
"position": [
1168,
224
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "id-1",
"name": "customerName",
"type": "string",
"value": "={{ $json.body.name }}"
},
{
"id": "id-2",
"name": "customerEmail",
"type": "string",
"value": "={{ $json.body.email }}"
},
{
"id": "id-3",
"name": "bookingDate",
"type": "string",
"value": "={{ $json.body.date }}"
},
{
"id": "id-4",
"name": "bookingTime",
"type": "string",
"value": "={{ $json.body.time }}"
},
{
"id": "34865dea-9db2-4f35-b91b-322572680869",
"name": "bookingStartISO",
"type": "string",
"value": "={{ new Date($json.body.date + 'T' + $json.body.time + ':00+09:00').toISOString() }}"
},
{
"id": "941d5f18-54fd-41ad-8f46-c9f9f13fb32f",
"name": "bookingEndISO",
"type": "string",
"value": "={{ new Date(new Date($json.body.date + 'T' + $json.body.time + ':00+09:00').getTime() + 60*60*1000).toISOString() }}"
}
]
},
"includeOtherFields": true
},
"typeVersion": 3.4
},
{
"id": "6591a8f7-2400-4de8-9fbe-b35271faf1f8",
"name": "Check Calendar Availability1",
"type": "n8n-nodes-base.googleCalendar",
"position": [
1472,
224
],
"parameters": {
"options": {},
"timeMax": "={{ $json.bookingEndISO }}",
"timeMin": "={{ $json.bookingStartISO }}",
"calendar": {
"__rl": true,
"mode": "id",
"value": "={{ $('Workflow Configuration1').first().json.calendarId }}"
},
"operation": "getAll"
},
"typeVersion": 1.3,
"alwaysOutputData": true
},
{
"id": "d80641b0-9da6-491c-922f-d278c0f030c3",
"name": "Is Time Slot Available?1",
"type": "n8n-nodes-base.if",
"position": [
1824,
224
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "14e9293a-f96c-45f1-b216-2c8aaf2fb3e2",
"operator": {
"type": "object",
"operation": "empty",
"singleValue": true
},
"leftValue": "={{ $json }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "76a27cb5-7196-4564-a89a-85d5d0a41d52",
"name": "Create Calendar Event1",
"type": "n8n-nodes-base.googleCalendar",
"position": [
2144,
208
],
"parameters": {
"end": "={{ $('Extract Booking Details1').first().json.bookingEndISO }}",
"start": "={{ $('Extract Booking Details1').first().json.bookingStartISO }}",
"calendar": {
"__rl": true,
"mode": "id",
"value": "={{ $('Workflow Configuration1').first().json.calendarId }}"
},
"additionalFields": {
"summary": "=Booking with {{ $('Extract Booking Details1').first().json.customerName }}",
"attendees": [
"={{ $('Extract Booking Details1').first().json.customerEmail }}"
],
"description": "=Customer: {{ $('Extract Booking Details1').first().json.customerName }} ({{ $('Extract Booking Details1').first().json.customerEmail }})"
}
},
"typeVersion": 1.3
},
{
"id": "9f4ca36f-8f02-43ee-8630-222958201959",
"name": "Create Zoom Meeting1",
"type": "n8n-nodes-base.zoom",
"position": [
2416,
208
],
"parameters": {
"topic": "=Booking with {{ $('Extract Booking Details1').first().json.customerName }}",
"authentication": "oAuth2",
"additionalFields": {
"duration": 60,
"timeZone": "UTC",
"startTime": "={{ $('Extract Booking Details1').first().json.bookingStartISO }}"
}
},
"typeVersion": 1
},
{
"id": "a31d67fa-38b4-4276-a0ad-56d1069f95dd",
"name": "Send Confirmation Email1",
"type": "n8n-nodes-base.gmail",
"position": [
2720,
208
],
"webhookId": "f28b9459-360b-4cad-9f2e-0d69654e795b",
"parameters": {
"sendTo": "={{ $('Extract Booking Details1').first().json.customerEmail }}",
"message": "=Hi {{ $('Extract Booking Details1').first().json.customerName }},\n\nYour booking has been confirmed!\n\nDate & Time: {{ new Date($('Extract Booking Details1').first().json.bookingStartISO).toLocaleString('ja-JP', { timeZone: 'Asia/Tokyo' }) }}\n\nZoom Meeting Link: {{ $json.join_url }}\n\nLooking forward to meeting you!\n\nBest regards",
"options": {},
"subject": "=Booking Confirmed: {{ new Date($('Extract Booking Details1').first().json.bookingStartISO).toLocaleString('ja-JP', { timeZone: 'Asia/Tokyo' }) }}"
},
"typeVersion": 2.1
},
{
"id": "b456c4f9-dcca-48a4-b750-f39e95df493f",
"name": "Notify Teammate on Slack1",
"type": "n8n-nodes-base.slack",
"position": [
3040,
208
],
"webhookId": "866a3241-98d2-4db1-b791-c8c8f83b99b9",
"parameters": {
"text": "=🎉 New booking confirmed!\n\n*Customer:* {{ $('Extract Booking Details1').first().json.customerName }} ({{ $('Extract Booking Details1').first().json.customerEmail }})\n*Date & Time:* {{ new Date($('Extract Booking Details1').first().json.bookingStartISO).toLocaleString('ja-JP', { timeZone: 'Asia/Tokyo' }) }}\n*Zoom Link:* {{ $json.join_url }}",
"select": "channel",
"channelId": {
"__rl": true,
"mode": "id",
"value": "={{ $('Workflow Configuration1').first().json.slackChannel }}"
},
"otherOptions": {},
"authentication": "oAuth2"
},
"typeVersion": 2.3
},
{
"id": "78d4ae92-b136-4bbe-ae52-a73a60c47a6c",
"name": "Send Unavailable Email1",
"type": "n8n-nodes-base.gmail",
"position": [
2144,
512
],
"webhookId": "98dd0319-284e-4b12-a655-a57577571800",
"parameters": {
"sendTo": "={{ $('Extract Booking Details1').first().json.customerEmail }}",
"message": "=Hi {{ $('Extract Booking Details1').first().json.customerName }},\n\nThank you for your booking request. Unfortunately, the requested time slot on {{ new Date($('Extract Booking Details1').first().json.bookingStartISO).toLocaleString('ja-JP', { timeZone: 'Asia/Tokyo' }) }} is not available.\n\nPlease submit a new booking request with an alternative time.",
"options": {},
"subject": "Time Slot Unavailable"
},
"typeVersion": 2.1
},
{
"id": "9f8af7ba-09f1-46bb-9bc6-bb2d0b26d744",
"name": "Sticky: Google Forms Webhook1",
"type": "n8n-nodes-base.stickyNote",
"position": [
96,
-400
],
"parameters": {
"color": "white",
"width": 768,
"height": 528,
"content": "Title: Automated Booking → Calendar + Zoom + Email + Slack\nWhat this workflow does\n\nCaptures booking submissions from a form and parses date/time.\n\nChecks Google Calendar for conflicts.\n\nIf free: creates a Calendar event → creates a Zoom meeting → emails the guest → notifies your team on Slack.\n\nIf busy: emails the guest to pick another time.\n\nFlow\nWebhook → Merge → Config → Extract details → Check availability → IF (free/busy) →\n[Free] Create Calendar Event → Create Zoom → Email confirmation → Slack notify\n[Busy] Email unavailability\n\nNotes\n\nKeep all user-editable variables in the Set nodes for easy maintenance.\n\nDate handling assumes Asia/Tokyo input and converts to ISO for API calls.\n\nNo hardcoded credentials inside HTTP nodes; store secrets via Credentials."
},
"typeVersion": 1
},
{
"id": "5eb1dc05-5c0f-44a0-9000-d4abdd74a981",
"name": "Sticky: Merge Form Data1",
"type": "n8n-nodes-base.stickyNote",
"position": [
80,
384
],
"parameters": {
"color": "white",
"width": 256,
"height": 176,
"content": "Purpose: Entry point for bookings. Receives a POST payload from your form (name, email, date, time).\nOutput: Raw form fields under body.* used downstream."
},
"typeVersion": 1
},
{
"id": "967bcc58-fc07-4e4c-8b17-5f2a99f9287f",
"name": "Sticky: Workflow Configuration1",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
384
],
"parameters": {
"color": "white",
"width": 272,
"height": 176,
"content": "Purpose: Normalizes/forwards webhook data to keep a single item moving through the flow.\nTip: Use this as a “buffer” if you ever add parallel inputs later."
},
"typeVersion": 1
},
{
"id": "663ecdf9-6f9d-481c-abe6-e7d8b3c34021",
"name": "Sticky: Extract Booking Details1",
"type": "n8n-nodes-base.stickyNote",
"position": [
736,
384
],
"parameters": {
"color": "white",
"width": 288,
"height": 176,
"content": "Purpose: Central place for editable constants (e.g., calendarId, slackChannel, teammateEmail).\nWhy: Makes the template plug-and-play—update values here instead of hunting through nodes."
},
"typeVersion": 1
},
{
"id": "c12bee38-9494-43b7-9961-2e4971a92316",
"name": "Sticky: Check Calendar Availability1",
"type": "n8n-nodes-base.stickyNote",
"position": [
1088,
384
],
"parameters": {
"color": "white",
"width": 272,
"height": 176,
"content": "Purpose: Maps form fields to clean variables: customerName, customerEmail, bookingDate, bookingTime.\nAlso: Builds bookingStartISO and bookingEndISO (60-min duration) using the submitted local time (JST) → ISO strings."
},
"typeVersion": 1
},
{
"id": "b58f33ab-ad60-4a98-9354-3ed1a1aeab72",
"name": "Sticky: Is Time Slot Available?1",
"type": "n8n-nodes-base.stickyNote",
"position": [
1424,
384
],
"parameters": {
"color": "white",
"width": 256,
"height": 176,
"content": "Purpose: Queries the target calendar for events overlapping bookingStartISO–bookingEndISO.\nBehavior: Returns an empty list when the slot is free; non-empty when it’s taken."
},
"typeVersion": 1
},
{
"id": "b0b7376c-f552-4ce9-bd31-33919ba04618",
"name": "Sticky: Create Calendar Event1",
"type": "n8n-nodes-base.stickyNote",
"position": [
1744,
384
],
"parameters": {
"color": "white",
"width": 256,
"height": 176,
"content": "Purpose: Branches on availability.\nTrue (empty result): Slot is free → proceed to create the event.\nFalse (has events): Slot is busy → send “unavailable” email."
},
"typeVersion": 1
},
{
"id": "bb03b52c-ddc4-4896-9016-6d01ab6b68ec",
"name": "Sticky: Create Zoom Meeting1",
"type": "n8n-nodes-base.stickyNote",
"position": [
2000,
16
],
"parameters": {
"color": "white",
"width": 272,
"content": "Purpose: Books the time on Google Calendar with the guest as an attendee.\nFields: Summary includes guest name; Description includes name + email for quick context."
},
"typeVersion": 1
},
{
"id": "73736740-501f-4814-9722-e8576e2dd21f",
"name": "Sticky: Send Confirmation Email1",
"type": "n8n-nodes-base.stickyNote",
"position": [
2336,
16
],
"parameters": {
"color": "white",
"content": "Purpose: Creates a Zoom meeting for the confirmed slot.\nTiming: Uses the booking start time and a 60-minute duration.\nOutput: Provides join_url used by Email/Slack steps."
},
"typeVersion": 1
},
{
"id": "6e9c22c3-0b31-47f9-ab96-4476e501175d",
"name": "Sticky: Notify Teammate on Slack1",
"type": "n8n-nodes-base.stickyNote",
"position": [
2640,
16
],
"parameters": {
"color": "white",
"width": 256,
"content": "Purpose: Sends a confirmation to the guest with local (Japan) date/time and the Zoom link.\nSubject/Body: Human-readable datetime via toLocaleString('ja-JP', { timeZone: 'Asia/Tokyo' })."
},
"typeVersion": 1
},
{
"id": "b9aa000c-63a2-44b1-800a-c041a1582f64",
"name": "Sticky: Send Unavailable Email1",
"type": "n8n-nodes-base.stickyNote",
"position": [
2064,
672
],
"parameters": {
"color": "white",
"width": 256,
"content": "Purpose: Notifies the guest when the requested slot is already taken and asks them to rebook another time."
},
"typeVersion": 1
},
{
"id": "3904238d-39eb-40f0-879f-3f17e1afd303",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
2960,
16
],
"parameters": {
"content": "Purpose: Posts a concise booking summary to your specified Slack channel.\nIncludes: Guest name/email, localized date/time, and Zoom join_url."
},
"typeVersion": 1
},
{
"parameters": {
"operation": "verify",
"email": "={{ $('Extract Booking Details1').first().json.customerEmail }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
2360,
208
],
"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": [
2540,
208
],
"name": "IF deliverable"
},
{
"parameters": {
"operation": "verify",
"email": "={{ $('Extract Booking Details1').first().json.customerEmail }}",
"additionalOptions": {}
},
"type": "n8n-nodes-billionverify.billionVerify",
"typeVersion": 1,
"position": [
1784,
512
],
"name": "Verify Email (BillionVerify) 2",
"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": [
1964,
512
],
"name": "IF deliverable 2"
}
],
"connections": {
"Merge Form Data1": {
"main": [
[
{
"node": "Workflow Configuration1",
"type": "main",
"index": 0
}
]
]
},
"Create Zoom Meeting1": {
"main": [
[
{
"node": "Verify Email (BillionVerify)",
"type": "main",
"index": 0
}
]
]
},
"Google Forms Webhook1": {
"main": [
[
{
"node": "Merge Form Data1",
"type": "main",
"index": 0
}
]
]
},
"Create Calendar Event1": {
"main": [
[
{
"node": "Create Zoom Meeting1",
"type": "main",
"index": 0
}
]
]
},
"Workflow Configuration1": {
"main": [
[
{
"node": "Extract Booking Details1",
"type": "main",
"index": 0
}
]
]
},
"Extract Booking Details1": {
"main": [
[
{
"node": "Check Calendar Availability1",
"type": "main",
"index": 0
}
]
]
},
"Is Time Slot Available?1": {
"main": [
[
{
"node": "Create Calendar Event1",
"type": "main",
"index": 0
}
],
[
{
"node": "Verify Email (BillionVerify) 2",
"type": "main",
"index": 0
}
]
]
},
"Send Confirmation Email1": {
"main": [
[
{
"node": "Notify Teammate on Slack1",
"type": "main",
"index": 0
}
]
]
},
"Check Calendar Availability1": {
"main": [
[
{
"node": "Is Time Slot Available?1",
"type": "main",
"index": 0
}
]
]
},
"Verify Email (BillionVerify)": {
"main": [
[
{
"node": "IF deliverable",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable": {
"main": [
[
{
"node": "Send Confirmation Email1",
"type": "main",
"index": 0
}
],
[]
]
},
"Verify Email (BillionVerify) 2": {
"main": [
[
{
"node": "IF deliverable 2",
"type": "main",
"index": 0
}
]
]
},
"IF deliverable 2": {
"main": [
[
{
"node": "Send Unavailable Email1",
"type": "main",
"index": 0
}
],
[]
]
}
},
"settings": {
"executionOrder": "v1"
}
}Workflow templates with Zoom
Ready-to-use workflows that verify emails before Zoom sends.
How it works
- 1
Use n8n or Integrately to listen for new Zoom webinar or meeting registrant events.
- 2
Extract the registrant's email address and send it to BillionVerify for verification.
- 3
Receive a verdict — valid, invalid, disposable, catch-all, or role-based — within milliseconds.
- 4
Conditionally approve the registration and trigger Zoom's confirmation flow, or reject and notify the registrant to use a real address.
- 5
Log verification results for reporting on registrant list quality across events.
When to use this
Screen webinar registrants in real time
Connect Zoom's webinar registration event to BillionVerify so every new signup is checked before the confirmation email is dispatched. Registrants using disposable or invalid addresses can be declined or flagged for manual review, protecting your attendee data quality.
Protect reminder and follow-up email campaigns
Post-webinar follow-ups, recording links, and survey invitations all depend on valid addresses. Running your registrant list through BillionVerify before those sends reduces bounce rates and keeps your domain reputation healthy for future events.
Audit registration lists before large events
Before a high-stakes product launch or conference, bulk-verify the full registrant list using BillionVerify's REST API. Identify and suppress unreachable or suspicious addresses before investing in event-day communications.
FAQ
Can I automatically decline Zoom registrations from disposable email addresses?
Yes. Using n8n or Integrately, you can build a conditional workflow that calls Zoom's registration approval API to decline or pend registrants whose addresses BillionVerify flags as disposable or invalid.
Does this work for both meetings and webinars?
It works best with Zoom Webinars, which have formal registration flows. For standard meetings with registration enabled, the same integration pattern applies via Zoom's API and webhooks.
Will legitimate registrants experience any delay?
BillionVerify's API responds in well under a second, and the verification step can run asynchronously after the user submits the form, so the perceived experience for real registrants is seamless.
What about catch-all email addresses from corporate domains?
Corporate catch-all addresses are common and may belong to genuine attendees. BillionVerify returns a distinct catch-all status so you can choose to allow them while still blocking clearly invalid or disposable addresses.
Verify emails in Zoom
Create a free account, grab your API key, and stop bounces before they happen.
Get started free