Success stories
See how businesses across industries use MailVeri to improve deliverability, reduce costs, and protect their sender reputation.
Fashion Retailer Reduces Bounce Rate by 45% & Saves $2,100/Mo on Klaviyo
!The Challenge
Veloria accumulated 50,400 subscriber profiles over three years of holiday giveaways and 15%-off welcome popups. Promotional bounce rates climbed to 6.8%, Gmail inbox placement fell to 72%, and the brand was paying Klaviyo for thousands of dead, full-inbox, and disposable coupon-hunter profiles.
The Solution & Workflow
Ran a full 50,400-row CSV audit in MailVeri before Black Friday and connected the real-time REST API to their Shopify welcome popup. Suppressing 8,210 undeliverable and burner profiles immediately dropped their Klaviyo billing tier while restoring primary inbox placement.
- Exported all 50,400 Klaviyo profiles to CSV and ran a single bulk verification job ($39 for 60,000 Universal Credits including bonus).
- Suppressed 4,890 INVALID, 2,410 DISPOSABLE, and 910 FULL_INBOX contacts before launching BFCM flows.
- Added real-time MailVeri API check on the 15%-off welcome popup to block burner domains before issuing coupon codes.
Verified Results
Veloria Apparel — Verification Status Breakdown & Routing Policy
7-Status MailVeri Classification| MailVeri Status | Volume | List Share | Automated Action Taken |
|---|---|---|---|
| VALID (Deliverable) | 39,640 | 78.6% | Synced to primary Klaviyo promotional & VIP flows |
| INVALID (Hard Bounce) | 4,890 | 9.7% | Suppressed permanently — prevented 4,890 hard bounces |
| DISPOSABLE (Coupon Burners) | 2,410 | 4.8% | Deleted & blocked at popup capture via REST API |
| CATCH_ALL & ROLE_ACCOUNT | 2,550 | 5.1% | Segmented into engaged-only 90-day opener cadence |
| FULL_INBOX (Quota Exceeded) | 910 | 1.8% | Paused for 30 days to avoid repeated soft bounces |
"MailVeri paid for itself in the first week. Suppressing 8,210 dead and burner profiles lowered our monthly Klaviyo bill and our holiday campaigns finally hit the primary inbox."
B2B SaaS Startup Cuts Fake Trial Signups by 89% & Protects Postmark Reputation
!The Challenge
After launching a freemium AI tier with $10 in free compute credits, NexBoard was hit by automated signup bots and multi-account trial farmers using disposable domains (Mailinator, YOPmail, 10MinuteMail) and Gmail plus/dot aliases. Hard bounces on welcome emails spiked to 5.4%, triggering a Postmark compliance warning.
The Solution & Workflow
Integrated the MailVeri REST API directly into their registration webhook prior to sending magic-link emails. Every signup is checked for disposable status, MX validity, and canonical ESP alias normalization before allocating free-tier GPU credits.
- Called POST /v1/verify-mail/ synchronously during signup before firing Postmark magic-link or OTP emails.
- Rejected DISPOSABLE and INVALID statuses immediately at the registration form with a prompt to use a work email.
- Allowed VALID and corporate CATCH_ALL domains through while normalizing Gmail dot/plus aliases to stop repeat trial claims.
Verified Results
NexBoard AI — Verification Status Breakdown & Routing Policy
7-Status MailVeri Classification| MailVeri Status | Volume | List Share | Automated Action Taken |
|---|---|---|---|
| VALID (Work & Personal) | 10,420 / mo | 69.5% | Approved instantly + magic link sent via Postmark |
| DISPOSABLE (100K+ Burner DB) | 2,680 / mo | 17.9% | Blocked at signup — saved $26,800/mo in free-tier abuse |
| INVALID (Typos & Fake Domains) | 840 / mo | 5.6% | Blocked before email send — 0 Postmark hard bounces |
| CATCH_ALL (Enterprise B2B) | 890 / mo | 5.9% | Allowed through (fail-open for B2B domains) + OTP verified |
| ROLE_ACCOUNT (team@, info@) | 170 / mo | 1.1% | Allowed with shared-workspace flag in CRM |
"We stopped wasting compute credits and transactional email quota on burner accounts. Our Postmark bounce rate dropped to 0.4% overnight and trial-to-paid conversion tripled."
Lead-Gen Agency Cleans 500K Monthly B2B Prospects at $0.0004/Check
!The Challenge
Managing cold outbound sequences for 25+ B2B clients meant verifying 500,000 scraped leads every month from Apollo, LinkedIn Sales Navigator, and Clay. Legacy verification tools cost over $1,600/month and still let catch-all and recently churned corporate mailboxes slip through, burning secondary sending domains.
The Solution & Workflow
Standardized pre-sequence verification on MailVeri across all client workspaces. Every lead list is scrubbed via Bulk CSV or the REST API before importing into Instantly and Smartlead, isolating B2B catch-all domains from verified primary mailboxes.
- Replaced $1,600+/mo legacy verifier subscriptions with MailVeri pay-as-you-go Universal Credits ($199 per 500K checks, or $299 per 1M).
- Routed ONLY status="VALID" contacts to primary warm sending domains to keep client bounce rates strictly below 1.2%.
- Quarantined CATCH_ALL prospects into dedicated secondary domains with lower daily sending caps and suppressed all INVALID/DISPOSABLE rows.
Verified Results
Spark Digital Outbound — Verification Status Breakdown & Routing Policy
7-Status MailVeri Classification| MailVeri Status | Volume | List Share | Automated Action Taken |
|---|---|---|---|
| VALID (Verified B2B Inbox) | 334,000 / mo | 66.8% | Loaded into primary Instantly & Smartlead sequences |
| CATCH_ALL (Accept-All Server) | 98,500 / mo | 19.7% | Isolated to secondary catch-all domains (15/day cap) |
| INVALID (Churned Employees) | 54,000 / mo | 10.8% | Removed pre-send — prevented 54,000 hard bounces/mo |
| ROLE_ACCOUNT (sales@, info@) | 9,500 / mo | 1.9% | Excluded from personalized 1-on-1 cold outreach |
| FULL_INBOX & DISPOSABLE | 4,000 / mo | 0.8% | Suppressed globally across agency CRM |
"Switching 500,000 monthly checks to MailVeri saved our agency over $1,400 every single month while keeping every client sending domain under a 1.2% bounce rate."
Customer Results & ROI FAQs
How quickly do businesses see ROI after cleaning their email lists with MailVeri?
Most businesses recover the cost of verification on their very first campaign. Verifying 100,000 emails costs $59 ($9 for 10K, $299 for 1M), immediately eliminating 8–15% of dead and disposable contacts that inflate monthly ESP bills and trigger domain blacklisting.
Can MailVeri be used for both bulk CSV cleaning and real-time signup protection?
Yes. Every Universal Credit works across bulk file uploads (up to 1,000,000 rows per job), the real-time REST API for blocking disposable signups, and the Model Context Protocol (MCP) server for AI agents.
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