About the Email Validator
This free email validator checks whether an address is properly formed and whether its domain can actually receive mail. Paste the address, click validate, read the result.
It catches the mistakes that quietly cost you customers — a typo in a signup form, a disposable address used to grab a free trial, or a domain with no mail server behind it at all.
How to validate an email address
- Paste the email address into the field.
- Click Validate email.
- Read the report, and use Copy result to save it.
What gets checked
- Format — the syntax rules an address must follow: one @, a valid local part, a proper domain.
- Domain — whether the domain exists at all.
- Mail records — whether the domain publishes MX records, meaning it is set up to receive email. A domain with no MX record cannot accept mail, whatever the address looks like.
- Disposable providers — throwaway inbox services used for temporary signups.
What it cannot tell you
This is the honest limit of every email checker. Validation confirms an address is deliverable-looking; it cannot confirm the specific mailbox exists.
Mail servers deliberately stopped answering that question years ago, because spammers used it to harvest valid addresses. Most now accept anything at the domain and decide later. So notreal@gmail.com passes validation — Gmail’s domain is real and accepts mail. Whether that exact mailbox exists is only proven by sending something to it.
Where this saves you money
- Signup forms — catching gmal.com before the user submits saves a lost account.
- Email marketing — invalid addresses drive up your bounce rate, and a high bounce rate gets your whole domain flagged as spam.
- Free trial abuse — disposable addresses are how one person gets ten free trials.
- Imported lists — an old CSV always has dead domains in it.
Email Validator FAQs
Is this email validator free?
Yes. No signup, and no limit on checks.
Does it confirm the mailbox exists?
No. It confirms the format is valid and the domain is set up to receive mail. Only sending a message proves a specific mailbox is live.
What is an MX record?
A DNS record naming the mail servers for a domain. No MX record means the domain cannot receive email at all.
What is a disposable email address?
A temporary inbox from a throwaway service, used to sign up without giving a real address. They expire, so anything you send later is lost.
Why does a fake Gmail address pass?
Because gmail.com is a real domain with working mail servers. The tool cannot ask Google whether one particular mailbox exists.
Is the address I enter stored?
No. Nothing you type is saved.
Related online tools
- Phone Validator — the same check for phone numbers.
- Domain Lookup — see a domain’s MX and DNS records in full.
- VPN and Proxy Detector — check a signup’s connection.
- All IP tools — the full list.