Real-time email validation with catch-all detection, bounce prevention, and bulk CSV upload. Protect your sender reputation and improve deliverability.
Powerful validation tools to ensure every email in your list is deliverable before you hit send.
Validate individual email addresses instantly. Get detailed results including validity, catch-all status, and provider info.
Upload a CSV of email addresses and validate them all at once. Download results with validation status for each.
Identify catch-all domains that accept any email address. These can inflate your bounce rates if not handled.
Remove invalid and risky addresses before sending. Protect your sender reputation and keep bounce rates low.
Get instant validation results as you type or upload. No waiting -- see valid, invalid, and risky addresses immediately.
Validate email lists before adding them to campaigns or sequences. Clean data means better deliverability.
From raw list to clean, deliverable emails in minutes.
Type a single email or upload a CSV with thousands of addresses
We check syntax, MX records, SMTP response, and catch-all status
Get a clean list with validation status for every email address
Clear, color-coded results so you know exactly which emails are safe to send to.
sarah@acmecorp.com
Gmail / Google Workspace
john@olddomain.net
Mailbox does not exist
info@catchallserver.io
Domain accepts all addresses
marketing@techstartup.com
Microsoft 365
contact@defunct-biz.com
Domain has no MX records
Color-coded results: green for valid, red for invalid, yellow for catch-all domains.
Validate your emails, then put them to work with these OnLeads tools.
Send validated emails through personalized campaigns with tracking and analytics.
Automate follow-ups with multi-step email and call sequences using clean lists.
Find and validate emails from domains, names, and company data automatically.
Clean your lists before you send. Protect your reputation and boost deliverability.