Mailerlite email verification with BillionVerify
MailerLite is a popular email marketing platform known for its clean interface, automation features, and generous free plan. Integrating BillionVerify into your MailerLite workflows ensures subscribers are real, active, and safe to email — before they ever land in your audience.
Why verify before the send
MailerLite's deliverability depends heavily on list quality. A single campaign to a list polluted with invalid or disposable addresses can spike your bounce rate and put your account under review. BillionVerify filters these addresses upstream so your MailerLite campaigns consistently reach real inboxes.
Ready-to-use n8n workflow
Import this workflow into n8n — it verifies every address with BillionVerify before Mailerlite sends, so only deliverable contacts are emailed. Install the BillionVerify community node first, then add your API key.
{
"name": "Verify emails before sending in MailerLite + 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 MailerLite contacts",
"message": "Replace this Gmail send with your MailerLite 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 Mailerlite
Ready-to-use workflows that verify emails before Mailerlite sends.
How it works
- 1
Set up a MailerLite webhook or use the MailerLite n8n node to trigger a workflow whenever a new subscriber is added.
- 2
Route the subscriber's email address to the BillionVerify node for real-time SMTP verification.
- 3
Evaluate the returned flags — valid, invalid, disposable, role, catch-all — inside an n8n Switch or IF node.
- 4
Add confirmed valid subscribers to the appropriate MailerLite group; log or discard the rest.
- 5
Optionally send a confirmation event back to MailerLite to tag verified contacts for segmentation.
When to use this
Gate form signups in real time
Intercept new MailerLite form submissions with an n8n webhook, verify the email via BillionVerify, and only pass genuinely valid addresses to your MailerLite groups. This stops fake signups and disposable emails from entering your audience.
Automate pre-send list hygiene
Schedule a recurring n8n workflow that pulls inactive or unverified contacts from MailerLite, checks them against BillionVerify, and removes those that no longer resolve. Keep your list trim and your deliverability score high.
Validate imported contacts
Before importing a purchased or collected email list into MailerLite, send it through BillionVerify in bulk. Strip out invalid, role-based, and disposable addresses so only quality contacts enter your account.
FAQ
Will verifying emails slow down my MailerLite signup flow?
BillionVerify's API typically responds in under a second, so the delay is negligible for form users. For bulk imports you can run verification asynchronously in the background before contacts go live.
How do I connect BillionVerify with MailerLite?
The easiest path is via the BillionVerify n8n community node combined with MailerLite's n8n node. You can also use Integrately for a 1-click connection or call the BillionVerify REST API from any automation tool.
Does this help with MailerLite's subscriber limit?
Yes. By filtering invalid and disposable addresses before they enter MailerLite, you avoid wasting subscriber quota on contacts that will never open a message, keeping your plan count lean and meaningful.
What happens to catch-all addresses?
Catch-all addresses are flagged but not always removed — the decision is yours. Many teams keep them in a separate MailerLite group for lower-frequency sends, accepting the higher bounce risk for the potential engagement.
Verify emails in Mailerlite
Create a free account, grab your API key, and stop bounces before they happen.
Get started free