Free Bulk Email Verifier – Upload CSV & Verify 100 Emails Instantly
Use UDecode’s free bulk email verifier to quickly clean and validate your mailing list. Upload a CSV file (up to 100 email addresses) and get instant results. Each email is checked for syntax correctness, MX record presence, disposable domain usage, free providers, and role-based addresses. No sign-up required and results are processed securely in real-time.
How Bulk Email Verification Works
UDecode’s bulk email verifier analyzes each email using logical and DNS-based methods for speed and accuracy:
- Syntax Validation – Instantly identifies invalid email formats.
- MX Record Check – Confirms domains can receive messages.
- Disposable Detection – Blocks temporary and fake email domains.
- Free Provider Check – Detects Gmail, Yahoo, Outlook, and other free providers.
- Role-based Filtering – Flags generic addresses like info@ or sales@.
Step-by-Step: Using the Bulk Verifier
- Prepare your CSV with one email per line.
- Upload the file using the form above.
- Wait a few seconds while verification runs.
- Download your verified list instantly.
Why Choose UDecode’s Bulk Email Verifier
Reduce Bounce Rates
Eliminate invalid addresses before campaigns to maintain sender reputation.
Save Marketing Costs
Avoid wasted sends to fake or unreachable emails.
Protect Your Domain Reputation
Avoid spam traps and blacklists with clean, verified lists.
Fast & Secure Processing
Files are processed securely with no data stored or shared.
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Frequently Asked Questions
How many emails can I verify in bulk?
You can upload a CSV file and verify up to 100 email addresses instantly.
What checks are included in bulk verification?
Bulk verification includes syntax validation, MX lookup, disposable email detection, free provider check, and role-based email detection.
Do I need to register to use bulk verification?
No. You can verify emails in bulk for free without creating an account or logging in.