New Playbook: Cold Email Infrastructure Setup Guide
Read Now arrow_forwardEvery bounced email damages your sender reputation. Mailsfinder's free email verification tool uses real-time SMTP handshake to verify deliverability before you hit send. 99% accuracy. No credit card required.
Trusted by 5,000+ Modern Revenue Teams
From single address checks to bulk list cleaning, protect your sender reputation at every scale.
Paste any email address and get instant verification. Check deliverability, catch-all status, and validity in real-time.
Verify an Email arrow_forwardUpload a CSV of email addresses. Our engine verifies every address in parallel — clean lists of 100K+ emails in minutes.
Start Bulk VerificationBuild real-time email verification into your signup forms, CRM, or marketing automation. 200ms response, GDPR compliant.
View API Docs arrow_forwardWe don't just check syntax. Our multi-step SMTP verification actually confirms the mailbox exists and accepts mail.
Single address or bulk CSV upload with thousands of emails
We verify the domain has valid mail exchange records
We communicate with the mail server to confirm the mailbox exists
Get valid, invalid, catch-all, or risky status for each address
Dirty email lists kill deliverability. Upload your list and get a clean, verified dataset back — with invalid, catch-all, and risky addresses flagged and separated. Protect your domain reputation.
Upload Your Email List
CSV with email addresses — we handle lists of any size
Multi-Step Verification
SMTP handshake, MX check, syntax validation, catch-all detection
Download Clean List
Export verified emails with status tags for your outreach tool
Industry-leading accuracy with real-time SMTP verification. Here's how Mailsfinder compares to the competition.
A simple, powerful API that verifies any email address in real-time. Build verification into your signup forms, CRM, or automation workflows.
JSON responses for easy parsing. 200ms latency.
Pre-built blocks for low-code automation.
Connect 5,000+ apps in seconds.
Compliance-first data sourcing.
curl --request POST \
--url https://api.mailsfinder.com/v1/verify \
--header 'Authorization: Bearer YOUR_KEY' \
--data '{
"email": "sarah@salesforce.com"
}'
100K verified emails for $99/mo. That's $0.00099 per credit.
10,000 credits (finder + verifier)
100,000 credits (finder + verifier)
300,000 credits that never expire
Clean your newsletter and campaign lists before every send. Keep bounce rates under 2% and stay off blacklists.
Verify prospect emails before cold outreach. Every bounce hurts your domain reputation and email deliverability.
Verify emails at signup to prevent fake accounts and improve onboarding conversion rates.
Verify client email lists before launching campaigns. Protect your clients' sending reputation.
Every bounce hurts your sender reputation. Verify your email lists with 99% accuracy for free. No credit card required.
