Know if an email address is real before you send
We check the syntax, the domain, the mail server and the mailbox itself, flag catch-all, disposable and role addresses, and tell you in plain words whether to send.
Four checks, one clear answer
- Syntax and typos. Malformed addresses are caught, and slips like gmial.com get a suggested fix.
- Domain and mail servers. We confirm the domain exists and has servers that accept email.
- The mailbox itself. We ask the mail server whether the mailbox exists, then hang up before any message is sent.
- A verdict you can act on. Deliverable, risky, undeliverable or unknown, with the reason in plain words.
Every address, six ways
Each check removes a different kind of bad address. Together they catch what bounces, what never gets read and what hurts your sender reputation.
Syntax
Catches typos and malformed addresses, and suggests fixes like gmial.com → gmail.com.
Domain & MX
Confirms the domain exists and has mail servers that accept email.
Mailbox (SMTP)
Asks the mail server whether the mailbox exists, without sending a message.
Catch-all
Detects domains that accept every address, where a mailbox can’t be confirmed.
Disposable
Flags about 10,000 temporary-inbox providers that vanish after sign-up.
Role & free
Marks shared inboxes like info@ and sales@, and free webmail providers.
Clean a list in minutes, or verify at sign-up
Upload a CSV with up to 50,000 rows. We find the email column, check every address and give it back with a verdict on each row. Or call the API from your sign-up form to stop bad addresses at the door.
Check the DNS behind your own email
Gmail and Yahoo now require SPF, DKIM and DMARC from bulk senders. Check yours in seconds.
SPF Record Checker
Look up a domain’s SPF record, count its DNS lookups against the limit of 10 and find the mistakes that make SPF fail.
DMARC Record Checker
Check a domain’s DMARC record: its policy, reporting addresses and the settings that leave it open to spoofing.
DKIM Record Checker
Find a domain’s DKIM keys at common selectors (or the one you enter), and check their size and settings.
MX Record Lookup
See which servers receive email for a domain, in priority order, and which provider runs them.
Email Domain Health Check
MX, SPF, DKIM and DMARC for a domain in one report, with a plain-English list of what to fix.
Disposable Email Checker
Find out whether an email address or domain belongs to a disposable (temporary) email provider.
How verification works
How can you tell if a mailbox exists without emailing it?
We connect to the domain’s mail server and start the conversation a real message would: we say who we are, give a sender, and name the recipient. The server says whether it would accept mail for that recipient. Then we hang up before any message is sent.
What does “catch-all” mean?
Some domains accept mail for every address, real or not, and sort it out later. For those, the server always says yes, so no verifier can confirm a specific mailbox. We test a random address on each domain to spot them and mark their addresses as risky.
What does “unknown” mean?
The mail server didn’t give a clear answer: it was unreachable, asked us to try later (greylisting), or refuses verification requests. Unknown addresses aren’t charged differently, and retrying later sometimes gets an answer.
Is this accurate for Gmail, Outlook and Yahoo?
Gmail and Outlook answer clearly for their own addresses. Yahoo and AOL accept every address during the check, so their mailboxes show as catch-all (risky).
Do you keep my lists?
Uploaded lists and results are deleted 30 days after upload, or sooner when you delete them. We never email the addresses you check or share them with anyone.
Clean a whole list
Upload a CSV and get every address checked: syntax, domain, mailbox, catch-all and disposable.
Start with 100 free credits- Finds the email column in any CSV, keeps your other columns
- Deliverable, risky, undeliverable or unknown, with the reason for each
- Download everything, or only the addresses that are safe to send to
- An API for sign-up forms and CRMs
- Lists are deleted after 30 days