8-Signal Verification Engine
Every address is run through eight independent checks - syntax, MX, SPF/DKIM/DMARC, disposable domains, blacklists, and domain age - and resolved into one 0-100 trust score. No signup. No API key. Checked locally, on your own server.
Nothing leaves your server unless you switch on the optional cloud API.
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The Diagnostic Pipeline
Each signal narrows the verdict a little further. Nothing is a black box - every one of these is a real record read directly from the domain, not a guess.
Validates RFC syntax and catches common webmail typos - "gmial.com" → "gmail.com" - with a one-click fix.
Confirms the domain has a live mail server actually willing to accept mail.
Reads the raw authentication records for the domain, not just a pass/fail flag.
Flags throwaway inboxes and domains configured to silently accept anything.
Cross-checks the domain and IP against major public spam blacklists.
A domain registered yesterday scores differently than one that's been live for years.
Flags shared inboxes like info@ or support@ instead of a named person.
Every signal above resolves into one 0-100 number, with a valid / risky / invalid verdict.
The Toolkit
Drop the full checker into a page, or hand a client a single-purpose tool that works entirely on its own.
Full 8-signal check with a 0-100 trust score and one-click typo fixes.
Try it →Paste a document, CSV, or page source and pull out every address in it.
Try it →Confirms a domain can actually receive mail - see every server behind it.
Try it →Shows the actual raw authentication records for a domain - not just pass/fail.
Try it →Flags throwaway and catch-all domains before they land on your list.
Try it →Cross-references a domain, IP, or email against major public spam blacklists.
Try it →Catches malformed addresses and common webmail typos before a bounce happens.
Try it →Search a domain to see its category, industry, and trust score at a glance.
Try it →Who It's For
Don't know which tool you need yet? Find your team below.
Built for teams like these
Free to run, checked locally, live in one shortcode.
Free Email Checker