Paste a list and catch the addresses that will bounce — before they wreck your sender reputation. Checks syntax, role & disposable addresses, common domain typos, and whether each domain can actually receive mail (live MX lookup). Runs entirely in your browser; nothing is uploaded or stored.
MX lookups use public DNS-over-HTTPS (Google DNS). Checks up to 100 addresses at a time. This is a pre-send sanity check, not a full mailbox-level verification.
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Our realtor lists are already verified for deliverability — ~96% land. Grab 100 free records for your area and run them through this tool yourself.
Get 100 free verified records →Broken syntax, role addresses (info@, sales@), disposable domains, common typos (gmial.com), and domains with no mail server (MX) — the stuff that bounces.
Whether a specific mailbox exists. That needs an SMTP-level check. A clean result here means the address can receive mail, not that the person still reads it.
Bounces tell mail providers you're a spammer and push your good mail to spam. Scrubbing before you send protects your whole domain.