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IPQS Email Address Validation Activity

75M+ / day
Email Validator Requests Per Day
25+
Email Validation API Data Points
64% Better Email Verifier Performance
Data coverage

What Leaked Email Address Lookup Data Is Available?

Deploy the leaked email address verification API or utilize our bulk list processing tools to detect if the email address has been exposed in a public or privately listed data breach online. Our tools will also append the name of the companies or database breaches where the email was leaked online as well as the date of the breach. This makes it easy to identify a leaked email address that likely represent a fraudulent user with a compromised email address.

How it works

How Does Leaked Email Detection Work?

Search any email address against our leaked database consisting of over 5 billion leaked email addresses from over 3700+ data breaches online. IPQS uses automated scanners that parse leaked data and compromised credentials from private forums, chat groups, dark web, and similar sources. Further analysis can be performed using an email verifier tool which can also identify if the email is valid, risky, or leaked online. Our leaked email lookup tool works best with additional verification such as our compromised password checks and leaked username detection, for complete user protection.

Learn more

Learn more about email verification

Use this free email validation tool to verify email addresses with 99.9% accuracy. Check email address quality by verifying an email inbox exists with the mail service provider, validate email address syntax, verify email domain configurations, and analyze recent spam complaints, scams, fraud, or abuse threat reports. IPQS email verification check also determines if the mail domain is a common mail provider (identify free or business emails), if the email is role based ("sales@", "support@", etc.), account owner's name, email age, and disposable email status.

The IPQS email validator also checks email address reputation activity to detect a honeypot or spam trap which could affect email deliverability. Check if an email address is active using advanced email validation techniques. Identify email abuse issues such as fraudulent behavior for fake accounts, bots, and chargebacks with email risk scoring.

FAQs

Email Validation FAQs

Use the IPQS free email verifier tool on this page to perform a free email lookup for any address. In addition to validating the email address, a reverse email lookup can also be performed for email fraud prevention analysis. Identify fake accounts, invalid user data, and high risk behavior for registrations, payments, and lead generation. Our email validator performs advanced reputation checks to identify bounces, fake accounts, spam traps, or any email address quality issue. Verifying email addresses can be queried via an API lookup or by uploading an email marketing list through our bulk email verifier on the user dashboard which automatically removes duplicate email addresses. Our easy email verification API and example code make it a breeze to add IPQS email address verification service on your sites and apps. Take advantage of the same great email validator technology that this free lookup tool provides for any address.

What does the free email verifier check?
Inbox status, syntax, domain setup, disposable/role flags, trap signals, reputation, and leak exposure.
Does verification send an email to the address?
No. We verify without sending any message.
How accurate is it?
We target 99.9% accuracy on deliverability with advanced logic for catch-all hosts.
Can I bulk verify a list from a CSV?
Yes—upload, de-dupe, and export results with statuses and risk scores.
What's the difference between an email validator and a scam email checker?
The validator confirms deliverability; the scam checker adds risk scoring from abuse and leak signals.
How often should I re-verify my lists?
Every 3–6 months, and before large sends or after long dormancy.
Do you detect disposable and role-based emails?
Yes—both are flagged so you can filter or add friction.
How should I act on risk scores?
Allow low, challenge medium, block high risk. See the risk legend above.
Will email validation improve inbox placement?
Yes, lower bounces and cleaner lists support better sender reputation and inboxing.
Can I integrate with my forms and CRM?
Yes—use the Email Verification API for real-time checks and automate CRM hygiene.

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