Free email checker
Paste one email address or a whole list (up to 500). The checker finds broken addresses, domain typos like gmial.com, throwaway domains, and domains that cannot receive email.
What this checker tests
| Check | What it catches |
|---|---|
| Format | Missing @, spaces, double dots, commas, characters most providers reject, and the 64 and 254 character limits |
| Typos | Near-misses of popular domains (gmial.com, yaho.com, hotmial.com) and endings like .con |
| Domain | Domains that do not exist |
| Mail server (MX) | Domains that cannot receive email |
| Throwaway domains | Nearly 10,000 known disposable email domains, from the public-domain disposable-email-domains list |
| Role and free addresses | Shared inboxes like info@ and sales@, and free providers like Gmail and Yahoo (shown as notes, not errors) |
What it does not test
This free checker does not contact the mail server to ask whether the individual mailbox exists. That step needs a server with a good reputation, because mail servers often block ordinary computers that try it. A result of "Looks valid" means the address is well formed and its domain accepts mail; it does not prove the person's mailbox is open.
For a full mailbox check of a list before you send, use a verification service. See how mailbox checks work and how the main services compare.
How to read the results
- Looks valid Correct format, real domain, and the domain accepts email.
- Possible typo The domain looks like a misspelling of a popular one. Check with the person.
- Disposable A known throwaway service. The address will stop working soon.
- Invalid Broken format, a domain that does not exist, or a domain with no mail server.
- Unknown The lookup did not finish. Try again.
What the email checker does
A mistyped or fake email address means a lost customer, a bounced invoice or a damaged sender reputation. This checker looks at one address or a list of up to 500 and tells you which ones are broken, misspelled, throwaway or sent to a domain that can't receive mail. It gives you a clear label and a short reason for every address.
Benefits
- One address or a whole listPaste a single address or up to 500, one per line or separated by commas. Duplicates are removed for you.
- Suggests the right spellingWhen a domain looks like a slip of the finger, such as gmial.com or an ending like .con, it shows the address it probably should be.
- Explains what's wrongInvalid addresses get a plain reason, like a missing @, a space, two dots in a row or a domain that doesn't exist.
- Checks the domain can take mailIt looks up the domain's mail server records and names the main mail server when one is found.
- Flags throwaway addressesAddresses from known disposable email services are marked so you can decide whether to keep them.
- Helpful notes, not false alarmsShared inboxes like info@ and free providers like Gmail are noted but still count as valid.
- Quick summary and copy buttonFor lists you see counts of valid, risky and invalid addresses, and can copy only the valid ones in one click.
Who it is for
- Small-business owners checking a customer's address before sending an invoice or order update.
- Front desk and sales staff confirming an address someone just read out over the phone.
- Newsletter senders spot-checking a short list before importing it.
- Web developers testing why sign-up form addresses keep bouncing.
- Anyone who wants to catch a typo before sending an important email.
How to use it
- Type or paste one email address, or a list of up to 500.
- Click Check and wait a moment for the domain lookups to finish.
- Read each label: Looks valid, Possible typo, Disposable, Invalid or Unknown.
- Fix any typos, then copy the valid addresses if you checked a list.
Your privacy
The full email addresses stay in your browser and are not sent to ListaFix. Only the domain part after the @ is looked up through public DNS services, Cloudflare first and Google as a backup.
Questions people ask
- Is this email checker free?
- Yes. It is free, with no sign-up, for up to 500 addresses at a time.
- Does it send an email to the address?
- No. Nothing is sent to the address, and the address itself never leaves your browser. Only the domain is looked up in public DNS.
- Why does a real address show as "Possible typo"?
- Some real domains are one letter away from popular ones. If you are sure the address is right, you can ignore the warning.
- Can it tell me if a Gmail address exists?
- It confirms gmail.com accepts email and checks the address format, but not whether that specific Gmail account exists. That needs a mailbox check from a verification service.