Free AI Tool
Fake & Disposable Email Checker
Paste an email address. Get a syntax, mail-server, and disposable-domain check in under a second — free, no signup, no verification email sent.
How the Email Checker Works
Three checks. No email is ever sent to the address.
- 1
Paste an email address
Enter the email you want to check — a lead from a form, a signup, anything.
- 2
Run the check
The tool verifies syntax, looks up the domain's mail servers, and checks it against a disposable-provider list.
- 3
Read the verdict
Valid, risky, or invalid — with the specific reason, so you know whether to accept, flag, or reject it.
What Counts as “Fake”
Not every check means the same thing — here's what each signal actually tells you.
Bad syntax → invalid
No @, no domain, stray spaces — the address can't be a real inbox. Reject these outright; they're almost always typos or bot spam.
No mail server → invalid
A domain with no MX records can't receive mail at all, even if the syntax looks fine — a common sign of a typo'd domain (gmial.com) or a made-up one.
Disposable domain → risky
Mailinator, Guerrilla Mail, and similar temp-mail services exist specifically to dodge signup verification. The address is real, but it's not a real relationship.
Role-based address → risky
info@, admin@, support@ route to a shared inbox, not a person. Fine for B2B outreach forms, worth flagging for lead-gen forms that need a named contact.
Free webmail → informational only
gmail.com, yahoo.com, outlook.com are flagged, not penalized. Most consumer signups use them — they only matter if your form specifically wants a work email.
Passes everything → valid
Correct syntax, a domain that can receive mail, not on the disposable list, not role-based. As confident as a check like this can be without sending a real verification email.
Frequently Asked Questions
- How does the fake email checker work?
- It runs three checks: syntax (does it look like a real email), mail server (does the domain have MX records that can actually receive mail), and disposable-domain matching against a list of known temp-mail providers. It also flags role-based addresses like info@ or admin@.
- What's the difference between 'invalid' and 'risky'?
- Invalid means the email can't receive mail at all — bad syntax or no mail server. Risky means it's technically deliverable but likely not a real signup: a disposable/temp-mail domain, or a role-based address like support@company.com rather than a person.
- Does this send a verification email?
- No. It only checks syntax and DNS mail records — it never sends anything to the address, so there's no risk of alerting a real user or hitting sending limits.
- Is a gmail.com or yahoo.com address fake?
- No. Free webmail providers are flagged as informational only, not as fake or risky. They're common for consumer signups — just not useful if you specifically need a work email domain.
- Can this catch every disposable email provider?
- No tool can — new temp-mail domains launch constantly. This checks against a curated list of well-known providers plus a live mail-server check, which catches typos and dead domains the list alone would miss. Treat it as a fast filter, not a guarantee.
- Can SiliForm validate emails automatically on my forms?
- Yes. SiliForm's AI answer validation checks every field as respondents type — including email format and suspicious patterns — so you don't have to run checks manually after the fact. Free plan included.
Checking after the fact is a workaround. Validating live is the fix.
SiliForm validates every answer with AI while respondents are still filling out the form — email, name, free text, all of it — so junk never reaches your response list.