Email Verifier

Without verification, invalid addresses drive up bounce rates and risk your account being blocked by ESPs (email service providers). Snov.io filters out risky addresses, protecting your sender reputation and ensuring your messages reach the intended recipients.

Snov.io Email Verifier runs every address through a precise 7-tier process that includes MX record checks, SMTP pings, and greylisting bypass for difficult cases. The results of each check are then combined into a single deliverability status.

With Snov.io, you can simply paste an email address for a quick result, or upload a full list of up to 100,000 lines to verify bulk email addresses. Results are returned in seconds and clearly labeled so you know exactly which addresses are safe to send to.

Email validation is a basic initial check that confirms an address is properly formatted and free of structural errors or invalid syntax. It typically focuses on obvious issues, like valid format, extra spaces, invalid characters, or typos. Email address verification is a more thorough process. It starts with email validation, then runs deeper technical checks (domain setup, MX record detection, SMTP server ping, catch-all email detection) to assess whether an email address exists and is safe to send to.

No, Snov.io Email Verifier doesn’t send a real message to the recipient’s inbox. Instead, it verifies email addresses using syntax validation, domain and MX record checks, and SMTP-level communication with the mail server.

Snov.io delivers 98+% accuracy, keeping bounce rates on verified lists as low as 1.72%. Sign up to verify your first 50 addresses for free and try it yourself.

Yes. Email verification reduces bounce risks but doesn't guarantee delivery. This means that even verified addresses can bounce due to temporary server issues, spam filters, or a full mailbox.  Think of it as an essential protection step rather than a guaranteed delivery solution.

Snov.io can verify most email addresses, including those from custom domains and disposable email addresses. 

Snov.io assigns one of 3 statuses to every address. Valid (green) means safe to send to. Invalid (red) means the address doesn't exist or can't receive emails. Unverifiable (yellow) means delivery is possible but can't be fully confirmed. Check out our full breakdown of each status.

Yes, Snov.io bulk email checker is available directly in the app and via API. To verify a list in the app, upload it to the Bulk Email Verifier tool in your dashboard and let the checker do the rest.

Yes, you can connect the free email checker to your application or Google Sheets via the email verification api and check an email address in real time. You can also collect verification results and push them into your workflows/CRMs/forms via Snov.io integrations.

Technically, email standards allow case sensitivity in the part before the @ symbol. In practice, however, most email providers, including Gmail, Outlook, and Yahoo treat uppercase and lowercase versions of the same address as identical.

That said, storing addresses in lowercase is good practice to avoid duplicate entries and keep your lists clean.

Yes, Snov.io verifies emails from Gmail, Yahoo, Hotmail, and other public providers. But results depend on how each mail server responds. If we can’t confirm it directly, the address is marked as Unverifiable instead of Valid or Invalid.

Greylisting is an anti-spam technique where a mail server rejects the first connection attempt and requires a retry after a short delay. This means verification results for greylisted addresses can't always be confirmed instantly.

Snov.io email checker handles this by adding an automatic retry step after a brief wait. If the follow-up attempt still fails, the address is marked as Unverifiable.

Verify your list 24-48 hours before every campaign launch and re-verify every three to six months to keep your deliverable emails consistently reaching the right inboxes. It is also worth running a check after importing new leads in bulk, or when bounce rates start to climb.

Sending to invalid addresses puts your sender reputation at serious risk. Snov.io email validator automatically excludes them from campaigns to prevent that.

Catch-all and unverifiable addresses carry more risk and should be treated with caution. Where possible, try to source a more specific address for that contact. If that isn't an option, segment them into a separate list and monitor bounce rates before rolling them into your main campaigns.

Yes, the Snov.io email verification tool is free with a free account - no credit card required. You get 50 credits every month and can stay on the free plan for as long as you need.

With Snov.io, each email address costs 1 credit to verify.

Yes, Snov.io operates in full compliance with GDPR across all its services, including the email verification tool. This means your data is processed on a lawful basis, handled securely, and never used beyond the scope of the service you signed up for.

Visit our Security Center to learn more about how Snov.io protects your data.