Protect HighLevel sub-accounts.
Eliminate bounce suspensions.
Clean client CSV lists and automate point-of-capture verification via GHL Webhooks. Keep campaign bounce rates strictly under 1.5% and cut email verification expenses by 76%.
The HighLevel Bounce Suspension Problem
LeadConnector Email enforces an automated Acceptable Use Policy (AUP) monitoring cluster-wide bounce rates. When onboarding legacy client lists, agencies face immediate account freezes.
The 2% Hard Ceiling
GHL mandates bounce rates below 2%. If an onboarding campaign spikes past 3%–5%, the system triggers an immediate automated block on outbound email.
The 3-Strike Policy
Violations escalate fast: Strike 1 blocks sending for 12 hours. Strike 2 blocks for 24 hours. Strike 3 is a permanent sub-account sending revocation.
The Native Markup
GHL charges $2.50 per 1,000 checks ($250 per 100K). On custom Mailgun, it costs $0.012 per email ($1,200 per 100K). High volume list cleaning becomes prohibitive.
Stop overpaying for GHL List Sanitization
Compare MailVeri's agency-first pricing against HighLevel's native tools and legacy providers:
| Provider | Cost per 100K | Inconclusive / Unknown Records | Net Agency Savings |
|---|---|---|---|
| MailVeri API & Bulk | $59 | 100% Instant Auto-Refund | Baseline (Best Value) |
| HighLevel LC Email Validation | $250 ($2.50/1k) | Full charge (No refund) | Save 76% with MailVeri |
| Mailgun (Connected to GHL) | $1,200 ($0.012/email) | Full charge (No refund) | Save 95% with MailVeri |
| NeverBounce | $400 ($4.00/1k) | Full charge (No refund) | Save 85% with MailVeri |
How to connect MailVeri with GoHighLevel
Because GoHighLevel does not host 3rd-party verification apps on its App Marketplace, agencies utilize two complementary, native integration paths:
Pre-Import CSV Cleaning
The mandatory firewall when onboarding new agency clients: clean their legacy CRM database before importing into GHL to eliminate historical list rot.
- Clean up to 1,000,000 contacts per batch
- 76% cheaper than native LC Email ($59 vs $250 / 100K)
- 100% auto-refund for any inconclusive Unknown records
GHL Workflow Custom Webhook
Validate incoming opt-ins from landing pages, surveys, and lead funnels via HighLevel Workflows before automated nurture emails fire.
- Native GHL Custom Webhook action (no Zapier needed)
- Sub-second verification with If/Else DND branching
- Supports JSON and URL-encoded payloads seamlessly
Method 1 Walkthrough: Pre-Import Bulk List Sanitization
Best for: New client onboarding, cold outreach lists, and aged CRM database migrations.
Export the client's customer contacts from their old CRM, POS, or database as a standard CSV or Excel file.
Upload directly to MailVeri Bulk Cleaning. Our async workers test MX records, disposable filters, and live SMTP handshakes.
Download only VALID contacts. Inconclusive records are 100% auto-refunded.
In HighLevel Sub-Account → Contacts → Import Contacts. Safe list keeps bounce rates strictly under 1.5%.
Method 2 Walkthrough: Real-Time Lead Validation in GHL Workflows
Best for: Form submissions, calendar bookings, survey funnels, and webhook lead captures.
POST, URL to https://api.mailveri.com/v1/verify-mail/, and include your API key header. Toggle ON “Save response for this Webhook” and click Test Webhook so HighLevel captures the return schema.- Branch 1 (Valid Email): If
{{webhook.status}}equalsVALID→ Apply Tagemail-verified→ Proceed to email nurture sequence. - Branch 2 (Invalid / Risky Email): If
{{webhook.status}}does not equalVALID→ Apply Tagemail-invalid→ Action: Update Contact Field → DND (Do Not Disturb) — Email: Enabled → Send SMS or WhatsApp fallback.
POST https://api.mailveri.com/v1/verify-mail/
Authorization: Bearer YOUR_MAILVERI_API_KEY
Content-Type: application/json
{
"email": "{{contact.email}}"
}POST https://api.mailveri.com/v1/verify-mail/
Authorization: Bearer YOUR_MAILVERI_API_KEY
Content-Type: application/x-www-form-urlencoded
email={{contact.email}}{
"error": 0,
"message": "Verified [email protected] successfully",
"status": "VALID",
"email": "[email protected]",
"mail": "[email protected]",
"balance": 4999
}Never fear an LC Email Block again
Join hundreds of marketing agencies that protect their client sub-accounts with MailVeri.