Email Verification API
Validate every address in real time and block disposable, invalid, and trap emails at signup.
Data Extraction · Free forever
Free Catch All Domain Checker
Avoid Risky Catch-All Domains
Enter domain to check if it accepts all emails. Avoid wasted credits and protect sender reputation.
Run the tool
This tool performs a live lookup (DNS, WHOIS, or a page fetch) that a browser cannot do on its own, so the value you enter is sent to our server for that check. It is not stored. If the lookup is unavailable, the tool falls back to its offline formula and tells you.
Under the hood
How this tool works
No black box. This is the exact logic the tool runs on every input you give it.
Formula
Catch-all = SMTP accepts a random local-part → per-address verification is inconclusive
- 1
Check RFC 5322 syntax on the local part, the domain labels, and the TLD.
- 2
Classify the domain: corporate, free provider, disposable, or parked.
- 3
Detect role addresses (info@, sales@, admin@) that rarely reach a human.
- 4
Combine the signals into a verdict — valid, risky, or invalid — with the reason attached.
Need this at scale?
Two Govarova products that do this automatically
The free tool handles one input at a time. These handle millions — verified, enriched, and ready to send.
Govarova Outreach
Run multi-step cold email cadences with AI personalisation, tracking, and a built-in CRM.
More free data extraction tools
Register & start — free
Run Free Catch-All Email Detector as often as you like. When you are ready to do it across your whole market, Govarova is waiting.