Bulk Email Verifier

Why You Need to Verify Your Email List

Sending cold emails to invalid addresses destroys your sender reputation. A bounce rate above 5% signals to Gmail and Outlook that your list is scraped or low-quality — and they'll start routing all your emails to spam, even the ones going to valid addresses.

Email verification catches bad addresses before you send. This tool checks your list against multiple validation layers: syntax rules, MX record lookups, and a database of 126,000+ known disposable email domains.

What This Tool Checks

• Syntax validation — catches typos, missing @ symbols, invalid characters, and malformed addresses
• MX record lookup — verifies the domain actually accepts email (has mail servers configured)
• Disposable domain detection — flags temporary email services like Guerrilla Mail, Temp Mail, and 126,000+ others
• Role account detection — identifies generic addresses (info@, admin@, support@) that rarely convert

How to Use It

1. Export your lead list as a CSV file from whatever tool you use (Apollo, LinkedIn, scrapers, etc.)
2. Upload the file — the tool auto-detects the email column
3. Wait for verification to complete (processes 50 emails concurrently)
4. Download the cleaned CSV with a status column showing which emails are safe to send

Free vs Full Verification

This free tool achieves approximately 80% accuracy. It catches the obvious problems — invalid syntax, dead domains, and disposable addresses. But it cannot verify whether a specific mailbox actually exists on the server.

For that, you need SMTP handshake verification (Port 25). This is what Cleanmails does: it connects directly to the recipient's mail server and asks "does this mailbox exist?" — without actually sending an email. This catches soft bounces, full mailboxes, and disabled accounts that MX-only checks miss.

Cleanmails includes unlimited SMTP validation with every license — no per-email fees, no credit systems. Verify millions of addresses at no additional cost.

Limits

This free tool processes up to 2,000 emails per upload. For larger lists, split your CSV into batches or use Cleanmails for unlimited bulk validation with higher accuracy.

Who Should Use This Tool?

Anyone sending cold email should validate their list first. This tool is especially useful for agencies, SDRs, and marketers who scrape leads from directories, LinkedIn, or purchased lists. Run every new list through verification before importing it into your sending tool — it takes minutes and can save your domain reputation.