Is this email valid? Free answer in under 2 seconds, from a real SMTP mailbox check rather than a format guess. 99.9% accuracy, 600 credits a month, plus 20 more every day you log in.
For the live mailbox check used in this guide, open the Free Email Verifier and review the SMTP, catch-all, disposable, and role-account results together.
Paste the address and BillionVerify answers is this email valid with six layers of evidence: valid syntax, a valid domain, valid MX records, a live SMTP mailbox probe, disposable detection, and role-account analysis. Is this email valid, free, in two seconds.
Six layers decide whether the address is valid, and each reports separately. Is this email valid, free, in under 2 seconds.
Is the string a valid address at all? Typos and malformed shapes fail here, before the network is touched.
Is the domain real and configured for mail? A domain can look valid and still accept nothing.
Are there valid MX records? No route means no message arrives, so the address cannot be valid.
A live SMTP probe. This is the only layer that can answer is this email valid for the mailbox itself.
Temporary inboxes are valid and still worthless as a contact. The flag keeps those apart.
info@ and support@ are valid mailboxes that rarely belong to a person you want to reach.
Four automated steps run every time you ask is this email valid.
Parse the address and confirm a valid structure. An invalid shape ends the question immediately.
Resolve the domain and its MX records to confirm a valid mail route exists at all.
Open an SMTP session and read the server's answer. Valid, not valid, or would not say.
Attach disposable, role, and catch-all flags, because a valid address is not automatically a useful one.
<2s
Response Time
Average validation time
99.9%
Accuracy
Multi-layer validation
600
Free Monthly Credits
No signup required
6
Validation Layers
Per address checked
Each tool narrows the question to one specific risk type. Is this email valid, free on every one of them.
Syntax + MX only — fast shallow checks before full verify.
Mailbox-level verification — 20 free SMTP checks per IP / 24h.
Validation steps and tools for cleaner lists.
A practical checklist for checking any email address.
Step-by-step guide with verification best practices.
Checking validity is one part of the picture. These guides cover the related questions people ask most.
Answering the question
Is this email valid is a simple question with a layered answer. Each layer rules out one way an address can be invalid, and only the last one can say the mailbox itself is valid.
The first pass asks whether the string is a valid address at all: a valid local part before the @, a valid domain after it, no illegal characters, no whitespace pasted in from a spreadsheet. Fail here and the answer to is this email valid is no, in milliseconds.
Pass here and you have learned almost nothing. Nothing about a well-formed string makes this email valid. Every dead address you have ever bounced against had perfectly valid syntax.
Next the domain is resolved for its MX records. A domain can be registered, valid, and still publish no mail route at all, in which case no message will ever arrive there.
This is where a lot of is this email valid questions get answered cheaply. If the destination cannot receive mail, the mailbox behind it cannot be valid either.
The decisive layer opens a real SMTP session and tests the recipient path. Nothing is delivered and nobody is notified. The server's reply is what turns is this email valid from a guess into an answer.
An accepted recipient makes this email valid. A permanent rejection means not valid. A deferral means the server would not say, which is a third answer and not a valid excuse to assume the best.
A disposable inbox can make this email valid for a week. A shared info@ address is valid indefinitely and still useless. A catch-all domain will call this email valid whether or not the person exists.
So the result keeps those flags beside the verdict. Is this email valid and is this email worth having are two questions, and one answer should not quietly settle both.
Reading the answer
Four outcomes. Is this email valid gets a straight answer in two of them and an honest hedge in the other two.
The server said yes at the moment you asked, and that answer makes this email valid on the strongest evidence the protocol offers.
It is still a snapshot. Ask is this email valid again before an important send if the record has been sitting for months.
Broken structure, no mail route, or an outright rejection. The address is not valid and will hard-bounce.
Keep the original string and the reason. Never invent a correction — a repaired guess can be perfectly valid and belong to a stranger.
The domain accepts any local part, so SMTP cannot tell a real mailbox from an invented one — it will call this email valid either way. Company files built from name patterns are full of these.
Treat catch-all as its own bucket rather than as valid. It is the one case where is this email valid genuinely has no answer.
Greylisting, deferrals, and rate limits are normal. Unknown means the check could not establish what would make this email valid, not that it is invalid.
Ask again later. Most unknowns resolve into a valid or not-valid answer on a second attempt.
When to ask
The question is cheap to ask and expensive to skip, but it is not worth asking everywhere.
An invoice, a contract, a password reset, a reply to a warm lead. Ask is this email valid once and the silent failure never happens.
Two seconds of checking beats a week of wondering why nobody replied. Is this email valid, free — there is no reason to skip it.
Signup forms and CRM entry are where invalid addresses are born. Asking is this email valid while the person is still on the page is the only chance to have the typo fixed by someone who knows the right answer.
Let a slow provider through as unverified rather than blocking the form; ask again in the background.
A valid answer ages. People leave, aliases retire, domains move. For a whole file, Bulk Email Verification asks the same question of every row at once.
Ask is this email valid on a sample here first, then run the file once the answers make sense.
Limits
Valid is a narrow, honest claim. Three things it deliberately does not include.
A valid mailbox is not a mailbox you are allowed to email. Consent lives in your own records, not in this result.
Ask is this email valid to protect your bounce rate; ask your own system whether you may send at all.
A valid company address does not prove the person named in your CRM controls it, or still works there. Shared aliases break that assumption constantly.
Establish ownership from first-party evidence. SMTP can call this email valid; it cannot tell you whose mailbox it is.
A perfectly valid address can still receive your message in spam, because placement depends on your sending reputation, authentication, and content.
Remove invalid addresses here, then treat placement as a separate discipline.
Related pages
The same engine answers several differently-worded questions. Pick the page that matches how you phrase it.
The Verify Email Address page is written around whether a message will arrive rather than around whether an address is valid.
Same engine, same accuracy — it just answers a differently-shaped question.
The Email Validator stops at syntax and MX, so it can tell you the shape is valid and nothing more.
Use it as a cheap screen, never as an answer to is this email valid.
When one address is not enough, Email List Cleaning applies the same rules across a file and keeps every reason code.
It is the right tool once is this email valid becomes are these ten thousand emails valid. Is this email valid, free on the sample first.
Four steps: confirm the syntax is valid, resolve the domain and check it has valid MX records, open a direct SMTP session to see whether the mailbox is valid, then attach the risk flags. The answer to is this email valid comes back in under 2 seconds.
99.9%, because the check does not stop at format. A format-only tool will call any well-formed string valid; a live SMTP probe asks the server that actually owns the mailbox. That is the difference between guessing and answering is this email valid.
Constantly. Valid syntax only means the string is well-formed. The domain may have no valid mail route, the mailbox may have been closed years ago, or the whole address may be a typo that happens to be valid on paper. That gap is the entire reason this page exists.
Technically yes — a live throwaway mailbox accepts mail today and disappears next week, which makes this email valid and worthless at the same time. So the result marks it valid and flags it disposable, and you decide whether valid is enough.
Yes. Is this email valid, free and without signup: 600 credits a month, plus 20 more every day you log in, no credit card required. The full SMTP probe runs on the free tier too.
No. Every is this email valid request runs in real time and the address is never stored. Data is encrypted in transit and deleted immediately after processing.
Nineteen free tools alongside the paid AI features, none of them requiring an account.
Email Verify Tools
Check if an email address is valid with a free email verifier, no signup — syntax, MX, SMTP mailbox, disposable, role and catch-all checks.
Recipient evidence — not sender or DNS configuration.
Email Verify Tools
Free email validator for address syntax and published MX records. Run an email syntax and MX check instantly, without claiming SMTP mailbox proof.
Email Verify Tools
Free email spam checker: see whether an address sits on a domain with a recorded spam, phishing, or malware history. Check email for spam risk instantly, no signup.
Email Verify Tools
Free temporary email address detector: spot disposable and throwaway domains in real time, with focused disposable results for signups and list quality.
Email Verify Tools
Free bounce email checker: find out whether an address will hard bounce before you send, with a live SMTP probe. A hard bounce detection tool, no signup.
Email Verify Tools
Email list cleaning service with live SMTP verification on every row: dedupe, suppress hard bounces, keep the reasons. Clean email list free tool, no signup to try.
Is this email valid, free — 600 credits a month, plus 20 more every day you log in. A real SMTP probe every time, in under 2 seconds.
600 free credits monthly · No signup required · Answer in under 2 seconds
