Stop sending to dead inboxes.
Real-time email validation: syntax, MX, disposable detection, SMTP probe, catch-all check. Cleaner lists, lower bounce rate, better sender reputation.
jane.doe@acme-corp.io
ValidConnects to the recipient's mail server, runs RCPT TO without delivering — the only signal that actually matches what your real send will see.
Hardcoded blocklist of disposable + role-based addresses so you don't burn budget on burner inboxes from Mailinator, GuerrillaMail, plus another 100+.
Pro unlocks unlimited validations, batch CSV upload, and a Bearer-token API endpoint at /v1/email/{address}.
Three steps. Done.
Type or paste an email
Single address on the validator page, or upload a CSV (Pro) up to 10,000 rows.
We run the full pipeline
Syntax → DNS MX → disposable check → SMTP RCPT probe → catch-all detection → deliverability score 0–100.
Get a clean list back
Color-coded results with reason codes. Export the deliverable subset. Skip the rest.
We actually probe the mailbox.
Most cheap validators only do regex + DNS — useless for any list older than a week. Verifyr opens an SMTP session and asks the mail server. Same signal a real send produces.
Free or $19/mo. That's it.
No contracts. Cancel anytime.
Free
$0/forever
- ✓50 validations / day
- ✓Single-address checks
- ✓Reason codes (bounce / risky / valid)
- ✓30-day history
Pro
$19/month
- ✓Unlimited validations
- ✓Bulk CSV upload (10K rows)
- ✓API endpoint with Bearer auth
- ✓Webhook on completion
- ✓Daily export to S3 / email
Quick answers.
How accurate is the SMTP probe? +
On servers that accept SMTP probes (~85% of the internet), accuracy is ~95%. We label catch-all and gray-listed servers honestly so you don't get false positives.
Will my IP get flagged for probing? +
No — we probe from our own server pool with proper PTR records and conservative pacing. Your sending IP stays untouched.
What's a 'disposable' email? +
Burner inboxes from services like Mailinator, GuerrillaMail, 10MinuteMail. They self-destruct within minutes/hours. We block 100+ known providers; the list updates monthly.
How does catch-all detection work? +
We probe a random local-part at the domain. If the server accepts it, the domain is catch-all and your real address can't be confidently distinguished. We label it 'unknown' rather than lying.
Why pay $19 instead of using a free tool? +
Free tools do regex + DNS only. They miss 30-50% of dead inboxes that a real SMTP probe catches. The cost of one bounced campaign exceeds a year of Verifyr.
Is there an API? +
Yes, on Pro. GET /v1/email/{address} with Bearer auth. JSON response with all signals. Rate-limited to 100 req/min.
Validate one. Or 10,000.
Free tier is 50/day. No card. Upgrade only when you need bulk.