Before you import a signup list or wire up a contact form, it pays to know which addresses can actually receive mail. This email validator runs two separate checks on any address: first it will validate email syntax against the rules for a well formed address, then it looks up the domain's MX records to confirm a mail server is configured to accept messages. You get a clear Passed or Failed box for each stage, plus the live MX records sorted by priority so you can see exactly where mail would route. It's an email checker free of quotas and signups, and a practical way to verify email address online before a campaign goes out or a form ships.
Enter the address into the Email address field and click Validate, or just press Enter. The lookup runs server side, so your local network setup doesn't affect the DNS query.
02
Read the two result boxes
Syntax and MX records each show Passed or Failed. Syntax confirms the format is legal; the MX box confirms the domain publishes at least one server willing to accept mail.
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Inspect the MX table
When records exist, you'll see each mail server with its priority number. Lower numbers are tried first, so the top row is where a message to that domain would land.
Why Email Validator
Two-stage validation: syntax check + MX record lookup.
MX presence means the domain accepts email, not that the mailbox exists.
Live MX records shown so you can see where mail would route.
Common questions
What does the email validator actually check?
Two things: whether the address is syntactically valid, and whether its domain publishes MX records in DNS. Together they catch typos, malformed input, and domains that can't receive mail at all. What they don't confirm is that the specific mailbox exists, because only the receiving server knows that.
Can an address pass the email validator and still bounce?
Yes. A passing result means the format is legal and the domain runs a mail server, but the mailbox itself might be deleted, full, or misspelled. Think of a pass as clearing the checks that are knowable from the outside; the final word always comes from an actual delivery attempt.
How do MX records help verify an email address?
MX records are DNS entries that name the servers accepting mail for a domain. If a domain has none, messages to any address there will bounce, so an MX lookup instantly eliminates dead domains from a list. The tool shows the records live, sorted by priority, so you can see the actual routing.
Is this email checker free to use for whole lists?
It's completely free, though it checks one address at a time by design. For a handful of important addresses, a sales prospect, a DNS migration sanity check, a support contact, that's ideal. For cleaning tens of thousands of subscribers you'd want a bulk verification service with rate-limited SMTP probing.
Why validate email syntax separately from the MX lookup?
Because they fail for different reasons and need different fixes. A syntax failure means the input itself is broken, usually a typo like a missing @ or a double dot, and no DNS query will help. An MX failure with valid syntax means the text is fine but the domain can't receive mail, which points at the wrong domain or a DNS problem.
Does validating an email here send a message to the address?
No. It never connects to the mail server or performs an SMTP handshake, it only reads public DNS. That means the owner of the address is never pinged and nothing you check here shows up in anyone's inbox or logs as a delivery attempt.
What does a Failed MX box mean when I validate an email?
It means the domain publishes no mail exchanger records, so mail sent there has nowhere to go and will bounce. Common causes are a typo in the domain, a newly registered domain with no mail setup yet, or a DNS change that dropped the records. If it's your own domain, fix the MX entries before anything else.
What makes this a reliable email checker and email verifier?
It runs two objective checks instead of guessing. As an email checker it confirms the address is syntactically well formed, and as an email verifier it queries the domain's live MX records to confirm a mail server exists. Neither step touches the mailbox, so it's reliable for what it measures and honest about what it can't see.
Is there a free email verifier online with no limits here?
Yes. It's a free email verifier with no signup, no quota, and no card to enter. As an email verifier online it runs the lookup server side, so your own network never skews the DNS query, and used as a free email verifier online it still checks one address at a time by design.
How do I check email validity and verify email address with this tool?
Type the address and click Validate. To check email validity the tool tests the syntax, then confirms the domain publishes MX records. That two-part pass is how it helps you verify email address entries before they reach a signup list or a contact form, without ever sending a test message.
Does this email validator online double as an email verification tool?
Yes. The email validator online and the email verification tool are the same page: syntax plus MX in one click. It won't score sender reputation or run SMTP probes, so treat it as the fast first filter that catches typos and dead domains, not a full enterprise pipeline.
Can I run an email id check and email id verification here?
That's the core job. An email id check confirms the format is legal, and the email id verification step reads the domain's MX records to see if mail can land. As an email id verifier it shows those records live, sorted by priority, so you can see exactly where a message would route.
What does email id validation and online email id verification cover?
Both come down to the same two tests here. Email id validation checks the address is well formed, and online email id verification adds the MX lookup that proves the domain can receive mail. What neither covers is whether the specific inbox exists, since only the receiving server can confirm that.
Is the email verification online done live when I click Validate?
Yes. Every time you click Validate, the email verification online runs a fresh DNS query for the domain's MX records, server side, so the result reflects the domain's current setup rather than a cached snapshot. Nothing is saved after the answer is shown to you.
Does this validator check if email id is valid the moment I hit Validate?
It does. One click runs the syntax test and the MX lookup together, so it will check if email id is valid in the format sense and check email id is valid or not in the deliverable-domain sense. A green pass on both means the address cleared every check that's visible from outside the mailbox.
How do I check valid email id and check email is valid or not before importing a list?
Run each address through before it goes in. To check valid email id, watch the Syntax box, and to check email is valid or not overall, watch the MX box beside it. Both green means the address is worth keeping, while a failed MX box flags a domain that can't receive mail at all.
Can this handle email domain validation and email address verification?
Yes, that's most of what it does. Email domain validation is the MX lookup, which confirms the domain runs a mail server, and email address verification pairs that with the syntax check on the address itself. Together they catch the two failures you can spot without sending anything: a broken address and a dead domain.
Will this check email deliverability before a campaign?
Partly, and it's important to be precise here. It can check email deliverability signals, valid syntax and a domain with working MX records, but those don't guarantee the mail lands. Real deliverability also depends on the mailbox existing, sender reputation, and spam filters, none of which an outside DNS check can see.
Is this an email authentication checker for SPF or DKIM?
No. It validates syntax and MX records, so it isn't an email authentication checker for SPF, DKIM, or DMARC. Those live in a domain's TXT records, and you can read them with the DNS Lookup tool on this site instead. This page answers a narrower question: can the domain receive mail, and is the address well formed.
Can I validate email account existence with this tool?
You can validate email account formatting and the domain behind it, but not whether the individual mailbox exists. Confirming a real account would need an SMTP handshake with the mail server, which this tool never performs. A pass here means the address could receive mail, not that someone's inbox is waiting.