ESP Overpayment Calculator
Email marketing platforms charge you based on contact volume, even if 20% of your list is completely dead. Calculate your hidden waste and discover how much you can save.
Are you overpaying your ESP for dead contacts?
Industry data shows 22% of email lists decay each year. Most ESPs bill you for invalid contacts that never open.
You are paying ~$308/month just to store ~22,000 non-existent emails that hurt your open rates and sender reputation.
Why ESPs Overcharge for Dead Contacts
1. The 22% Annual Decay Rate
People change jobs, abandon disposable addresses, or disable old accounts. Without regular cleaning, nearly a quarter of your list turns invalid each year.
2. Tiered Pricing Penalties
Exceeding a contact tier by even a single email bumps you into a much more expensive monthly pricing bracket on platforms like Klaviyo and Mailchimp.
3. Permanent Deliverability Harm
Repeatedly sending to invalid mailboxes signals to Gmail and Outlook that your domain lacks list hygiene, landing future campaigns in the spam folder.
Need to verify more than one email?
Our free web tools are great for single quick checks. For cold outreach, email marketing, or database cleaning, use MailVeri Bulk.
| Feature | ESP Cost Calculator | MailVeri Bulk Engine |
|---|---|---|
Syntax & Domain MX Check Detects typos & non-existent domains | ||
Deep SMTP Handshake Pings recipient mail server directly without sending email | ||
Catch-All & Disposable Detection Catches temporary mailboxes & risky accept-all domains | ||
Spam Trap & Honeypot Filtering Protects domain reputation from blacklists | ||
Processing Speed High-speed distributed verification queue | 1 email / lookup | 100,000 emails / ~30 mins |
Batch File Upload Auto-detects email columns with zero setup | Up to 1,000,000 rows (CSV, XLSX, TXT) | |
Trial & Expiration No credit card required | Manual lookups only | 1,000 Free Credits • Never expire |
Why Combine DNS Audits & Bulk Verification?
Fixing SPF, DKIM, DMARC, and MX records protects your outbound domain authentication, while scrubbing your recipient list removes dead mailboxes, catch-all risks, and spam traps that trigger hard bounces and ESP account suspensions.
Keep Hard Bounce Rates Below 2%
Google Workspace, Microsoft 365, and Yahoo enforce strict sender thresholds. Verifying cold outreach and newsletter lists—including isolating catch-all domains without paying $800/100K—keeps your hard bounce rate safely below 2% and protects your sender reputation.
Up to 90% Cheaper List Hygiene
Legacy email verification tools charge $400 to $649 per 100,000 credits. MailVeri delivers 99%+ accuracy starting at $0.0002 per email ($59 per 100K / $299 per 1M non-expiring credits)—see how our rates compare against MillionVerifier, ZeroBounce & NeverBounce, DeBounce, Reoon, and EmailListVerify.
ESP Overpayment & CRM Cleaning FAQs
Read CRM & ESP List Cleaning GuideWhy do HubSpot, Klaviyo, and Mailchimp charge for dead contacts?
Marketing platforms bill by total stored or active profiles. Because B2B and consumer lists decay by 22–30% annually, unverified contacts quietly push your account into higher monthly pricing tiers—see our Klaviyo & Shopify Hygiene Playbook and direct Klaviyo & HubSpot integrations.
How much does it cost to clean a 100,000-contact CRM list?
MailVeri cleans 100,000 contacts for a one-time $59 ($9 for 10K, $299 for 1M) with non-expiring credits and 99%+ verification precision. See our Email Marketing ROI Calculation Guide and Pay-As-You-Go Pricing.