How does the email checker work?

It checks the address step by step: the format, common typos, whether the domain exists and has mail (MX) servers, whether it's a disposable or role address, and whether it has a public Gravatar. Where the mail server allows it, it then asks that server whether it would accept mail for the address (an SMTP RCPT check) and hangs up before any message is sent. No email is ever sent.

Can it check Gmail, Outlook and Yahoo addresses? Why do some say Unknown?

Yes, it checks addresses at any provider. But big providers like Gmail, Outlook and Yahoo often refuse to confirm whether a mailbox exists, or rate-limit outside checks, to stop spammers collecting addresses. When the mail server won't say, or the mailbox check isn't available, DWM Email Checker shows Unknown and explains why instead of guessing. A public Gravatar can still show that an address is in use.

What does catch-all (accept-all) mean?

Some domains accept email for any address, real or not, and sort it out later. DWM Email Checker tests this by also asking about a random address that can't exist. If that's accepted too, the domain is catch-all, so the specific mailbox can't be confirmed and the result is Risky.

What is a disposable email address?

A temporary inbox from services like Mailinator or 10 Minute Mail that stops working after a short time. DWM Email Checker compares the domain, its parent domains and its mail servers with a community list of nearly 10,000 disposable email domains, and marks matches as Risky.

Will the person know I checked their email address?

No. No email is sent and nothing arrives in their inbox. The mail server may log a connection that ended before any message was sent, but the person isn't notified.

Is DWM Email Checker free?

Yes, completely free, with no ads and no sign-up. To keep it fair for everyone, each person can run up to 60 checks per 10 minutes and 300 per day.

Can I verify a list of emails in bulk?

Yes. Switch to Bulk, then paste up to 50 addresses (one per line or separated by commas) or upload a .csv or .txt file. They're checked three at a time, and you can sort and filter the results by verdict and export them as a CSV file.

Do you store the email addresses I check?

No. Addresses are checked in memory and never saved or logged on the server. Your recent checks are kept only in your own browser, and you can clear them at any time. The site counts anonymous page views and which feature was used, never the addresses.

Invalid results are reliable: mail to a domain that doesn't exist, has no mail server, or to a mailbox the server rejects will bounce. Valid means the mail server confirmed the mailbox, or the address has a public Gravatar, but a mailbox can still be full, abandoned or filtered later. No checker can be 100% certain, so Risky and Unknown results say what couldn't be confirmed and why.

Who made DWM Email Checker?

DWM Email Checker was built by Muhammad Ahmad, a web and mobile app developer in Kuala Lumpur, Malaysia. See more of his work at dealwithmuhammad.com or email me@dealwithmuhammad.com.

Free email checker & verifier

Check if an email address exists

Verify any address before you send: format, domain, mail servers, disposable and role addresses, and the mailbox itself where the server allows it. No email is sent.

Check one

Bulkup to 50

What gets checked

Format & typos
Syntax rules, plus fixes for slips like gmial.com
Domain & MX
The domain exists and has mail servers
Mailbox
Asks the mail server where possible. No email is sent
Catch-all
Spots domains that accept any address
Disposable & role
Throwaway inboxes, info@, support@…
Gravatar, SPF & DMARC
Extra signs the address is in use

Recent checks

Saved only in this browser.

Email addresses (up to 50)

Paste addresses one per line, or separated by commas.

How to check if an email address exists

1
Enter the address
Type or paste the email address into the box at the top of the page and press Check (or Enter).
2
Read the verdict
You get Valid, Invalid, Risky or Unknown with a score, and a checklist: format, domain, mail servers, mailbox, disposable, role address and more. Open Technical details for MX records, SPF, DMARC and SMTP codes.
3
Fix typos or check a list
Click the “Did you mean…?” suggestion to fix a typo in one click, or switch to Bulk to paste or upload up to 50 addresses and export the results as a CSV file.

What DWM Email Checker does

Does the mailbox exist?
Where the mail server allows it, it's asked whether it would accept mail for the address. The check stops before anything is sent.
Domain and MX records
Confirms the domain exists and has mail servers, spots Null MX, and shows the provider: Gmail, Outlook, Zoho and more.
Typo fixes
Catches slips like gmial.com, hotmial.com or .con and fixes them in one click.
Disposable and role addresses
Flags throwaway inboxes from a list of nearly 10,000 disposable domains, and role addresses like info@ or support@.
Bulk checking
Paste or upload up to 50 addresses, sort and filter the results, and download them as a CSV file.
Private and ad-free
No ads, no sign-up. Addresses are checked in memory and never stored; recent checks stay in your browser.

Check if an email address exists

What gets checked

Recent checks

How to check if an email address exists

Enter the address

Read the verdict

Fix typos or check a list

What DWM Email Checker does

Does the mailbox exist?

Domain and MX records

Typo fixes

Disposable and role addresses

Bulk checking

Private and ad-free

Frequently asked questions