Circle email verification with BillionVerify
Circle is a community platform that lets creators and brands build membership spaces with discussions, courses, and events. Verifying member email addresses through BillionVerify before they join your Circle community prevents fake sign-ups and keeps your member engagement metrics meaningful.
Why verify before the send
Community platforms attract bot registrations and throwaway sign-ups, which inflate member counts, dilute engagement rates, and waste drip email sends. BillionVerify filters out invalid and disposable addresses at the point of registration so your Circle community reflects real, reachable members from the start.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Circle sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in Circle + 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 Circle contacts",
"message": "Replace this Gmail send with your Circle 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 Circle
Ready-to-use workflows that verify emails before Circle sends.
How it works
- 1
Use a Circle webhook or n8n trigger to capture new member sign-up events.
- 2
Extract the member's email address from the event payload.
- 3
Pass the address to BillionVerify via the n8n community node or REST API.
- 4
Evaluate the verification result and decide whether to approve, hold, or reject the membership.
- 5
Feed the verified status back into your Circle workflow or CRM for future segmentation.
When to use this
Block disposable emails at community sign-up
Verify every prospective member's email before granting Circle access. BillionVerify instantly identifies disposable and temporary email services so only genuine members enter your community.
Protect welcome and onboarding email deliverability
Welcome sequences are your first impression. Verifying addresses before sending onboarding emails reduces bounces, protects your sending domain reputation, and ensures new members actually receive their first message.
Keep paid membership lists accurate
For paid Circle tiers, an invalid email means a member you cannot reach for billing or renewal notices. Running BillionVerify at checkout ensures every paying member has a reachable address on file.
FAQ
Can BillionVerify check emails before they are submitted to Circle?
You can integrate BillionVerify into a pre-registration form or landing page via the REST API to validate the address before the Circle sign-up even completes.
Does BillionVerify detect role-based emails like info@ or support@?
Yes. Role-based addresses are identified in the verification response. You can choose to allow or block them depending on whether your community accepts organizational memberships.
What is a catch-all domain and should I block them in Circle?
A catch-all domain accepts all mail regardless of whether the specific address exists. BillionVerify flags these so you can decide — based on your community's risk tolerance — whether to allow or review them.
How do I connect Circle to BillionVerify without coding?
Use Integrately's 1-click connection between Circle and BillionVerify, or build a simple n8n workflow with the BillionVerify community node — no custom code required.
Verify emails in Circle
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