The email verifier that cleans your list
before you send
Verify email addresses in bulk or one at a time. Reduce bounce rates, improve deliverability, and protect your sender reputation — before every campaign.
Trusted by marketers.
The email verification tool built for serious senders
Bulk email list verification — up to 1 million addresses
Upload a CSV, XLS, or XLSX file up to 100 MB. The system auto-detects your email column and processes everything in the background — no need to stay on the page.
- CSV, XLS, XLSX up to 100 MB
- Auto-detects email column — no setup
- All original columns preserved on export
- Duplicate detection within and across files
Check if email exists — one at a time
Use Quick Verify to paste up to 50 email addresses directly — no file upload needed. Ideal for validating contacts before adding them to a campaign or your CRM.
- No file needed — paste directly
- Up to 50 addresses per submission
- Results with Delivery Score in seconds
See how email list cleaning works
across use cases
Pre-campaign email list scrubbing
Upload your list before every send and remove invalid, risky, and disposable addresses. Keep bounce rates below 2% and protect your sender reputation. Stay off ISP blocklists before your campaign even launches.
Verify a list
Improving email deliverability
High bounce rates quietly damage your sender score with every campaign you send. Regular email list cleaning keeps your reputation healthy and your emails landing in the inbox. Better hygiene means better deliverability — every time.
How it works
Bulk email bounce checker
Identify every address in your database that's likely to bounce — before you hit send. Export the invalid-only results as a suppression file for any sending platform. Stop bounces at the source, not after the damage is done.
How it works
Email verifier API integration
Connect the email verifier API to your sign-up forms, CRM, or data pipeline directly. Verify addresses programmatically and reject invalid emails at the point of entry. Keep your list clean from the moment contacts are added.
See API docsWhat sets Mailercloud Email Verifier apart
Live SMTP verification — not just DNS lookups
Most tools check DNS records and call it done. Mailercloud communicates directly with the recipient's mail server via SMTP to confirm the mailbox actually exists — giving you the most accurate results available.
Start Verifying
Delivery Score 0—100 for every address
Go beyond pass/fail. Every email gets a numerical Delivery Score so you can set your own threshold — send to 80+ addresses, flag 40—79 for review, and exclude everything below 40. Giving you full control over your list quality.
View Pricing
Simple, credit-based pricing
Starting from $5 for 1,000 credits. Use across bulk uploads, Quick Verify, and API — all from the
same credit pool.
Email Verification Credits
Enter quantity. Minimum 1,000 credits.
Buy only the credits
you need.
Starting from $5 for 1,000 credits. Use across bulk uploads, Quick Verify, and API — all from the same credit pool.
- Subscription credits renew each billing cycle
- Yearly plan saves you 20% vs monthly
- API access included in all plans
- Scale up or down anytime
Already a Mailercloud subscriber? You receive 100 free verification credits — automatically included in your plan. Log in to verify →
Marketers trust Mailercloud to keep
their lists clean
"We cleaned a 45,000-address list before our Q4 campaign. Our bounce rate dropped from 8.3% to under 1% overnight. The Delivery Score feature alone saved us from a deliverability nightmare."
Sarah Reynolds
Email Marketing Manager, TechFlow SaaS
"We verified 120,000 contacts before migrating to Mailercloud. The bulk upload handled everything in under 20 minutes. The cost was a fraction of what ZeroBounce quoted us — same accuracy, better price."
Marcus Klein
Head of Growth, Converta Agency
"I run email campaigns for five eCommerce clients. I verify every list before sending — it's non-negotiable. Mailercloud's one-time credits are perfect for my workflow. I buy when I need, and they're always there."
Priya Desai
Freelance Email Strategist
The most affordable email verification pricing
Cheaper than ZeroBounce, NeverBounce, Clearout, and Bouncer at
every single credit tier.
| Credits | Mailercloud↓ Cheapest | ZeroBounce | NeverBounce | Clearout | DeBounce | Bouncer |
|---|---|---|---|---|---|---|
| 1,000 | $5 | — | $8 | — | — | $7 |
| 2,000 | $9 | $16 | $16 | $21 | — | $14 |
| 5,000 | $19 | $39 | $40 | $28 | $10 | $30 |
| 10,000 | $29 | $65 | $50 | $58 | $15 | $50 |
| 50,000 | $79 | $190 | $175 | $175 | $50 | $200 |
| 100,000 | $129 | $350 | $300 | $280 | $90 | $300 |
| 500,000 | $449 | $1,000 | — | $900 | $300 | $1,000 |
One-time pay-as-you-go credits. Sourced March 2026. Competitor pricing subject to change.
Marketers trust Mailercloud
to keep their lists clean
"Mailercloud gave us everything we needed to communicate with our creators at scale — from automated onboarding to targeted campaigns. It just works."
Jijo Sunny
Co-founder & CEO of Buy Me a Coffee
Get started easily
Verify your first list, read the help guide, or connect the API — everything you need to start
cleaning your email list today.
FAQ
Common questions answered
Everything you need to know about Email verify tool
How accurate is Mailercloud's email verifier?
Does email verification send an email to the address?
How long does bulk email verification take?
Do email verification credits expire?
What file formats does the email list cleaner support?
Can I use the email verifier API to verify emails programmatically?
What is the difference between Deliverable, Invalid, and Risky emails?
How much does email verification cost?
Your next campaign deserves a clean, verified list
Better email hygiene means better deliverability. Start verifying today — straightforward
pricing, credits that never expire.
1,000 credits from $5 · Existing subscribers get 250 credits/month · Secure payments via Stripe
