Fake email checker
Paste an email address from a form fill or sign-up. See whether it's malformed, disposable, a free or role inbox, or on a domain that can't receive mail.
Published Updated
Stop fake emails at the form, not in your CRM.
GoodInbound is a form backend and lead screen for any form. It:
- Screens every submission for bots, fake sign-ups, and unsolicited sales pitches, whether a person or an AI wrote them.
- Labels each one lead, review, spam, junk, or bot, with a one-line reason.
- Enriches real leads and notifies you by email, Slack, or Telegram.
- Sends only real leads on to your CRM, workflows, and ad platforms.
What the checker looks at
- Syntax: whether the address is well formed at all.
- Disposable domains: matched against more than 9,000 temporary-inbox providers.
- Free providers: Gmail, Outlook, Yahoo, and more than 5,000 other free domains.
- Role addresses: shared inboxes like info@, sales@, and admin@.
- Gibberish: keyboard mashes and random strings before the @.
- Mail server: whether the domain has MX records, so it can receive email at all.
- Domain age: brand-new domains are a common sign of throwaway sign-ups.
What a fake email checker can't tell you
This checker doesn't contact the mail server to test whether the exact mailbox exists. That kind of probing is slow, often blocked, and unreliable on providers like Gmail and Outlook, which accept every address and bounce later.
No checker can tell you whether the person who typed the address owns it. Bots and spammers often fill forms with real addresses taken from data leaks. That's why the address is only one signal: how the form was filled in, the network it came from, and what the message says matter just as much.
Fake, risky, or fine?
- Fake: invalid syntax, a disposable domain, or a domain with no mail server. Safe to drop or label as junk.
- Risky: gibberish names, role inboxes, or very new domains. Worth a second look before a rep spends time on it.
- Fine for B2C, worth a flag for B2B: free providers like Gmail. Plenty of real buyers use them, so flag rather than block.
Questions
You can catch most fake addresses: malformed ones, disposable domains, gibberish names, and domains that can't receive mail. You can't tell from the address alone whether the person who typed it owns it, which is why lead screening also looks at behavior, network, and the message.
Not quite. Email verifiers like Hunter or ZeroBounce also probe the mail server to guess whether a mailbox exists, which matters before a cold email campaign. This checker is built for form fills and sign-ups, where the question is whether the person is real.
No. The address is checked and the result is returned. Mail server and domain age lookups are cached by domain only, so repeat checks are fast.
Up to 100 a day. To check every submission on your forms automatically, use GoodInbound Lead Screen, which runs the same identity checks on each one.