Free Email Verifier
Verify any email address in seconds. Check syntax, MX records, mailbox status, and disposable or role-based flags before you hit send.
Email verification results are provided for informational purposes and reflect checks at the time of the lookup. No email verifier is 100 percent accurate. Catch-all domains, greylisting, temporary server errors, and providers that mask mailbox responses can make some addresses uncertain. Use results as guidance alongside your own sending practices.
Verify an Email Address Before You Send
Our free email verifier tells you whether an email address is valid, deliverable, and safe to send to before a message ever leaves your outbox. Enter any address and the tool checks the syntax, confirms the domain has MX records, runs an SMTP mailbox check, and flags disposable or role-based addresses. It is the fastest way to check if an email is valid without sending a test message and risking your sender reputation.
Bad addresses are expensive. They drive hard bounces, drag down deliverability, waste sales reps' time, and can get your domain flagged by mailbox providers. Whether you are an email marketer cleaning a list, a RevOps team scrubbing CRM data, or a developer validating signups, this email checker gives you a clear, instant read on each address so you can decide whether to keep it, fix it, or drop it.
The tool is powered by 1Lookup's email validation engine, the same MX lookup and SMTP checks behind our paid API. The free version shows the core verification result for a single address. When you need full deliverability scoring, fraud signals, catch-all detection, or bulk verification of an entire list, sign up for 1,000 free lookups or connect the API.
How the Email Verifier Works
Enter an email address
Type or paste any email address into the box, such as name@example.com. There is nothing to install and no credit card required. Each free check runs against live infrastructure, not a stale list.
We run live verification checks
The tool validates the syntax, looks up the domain's MX records, performs an SMTP mailbox check, and inspects the address for disposable domains and role-based prefixes like info@ or support@.
Read your results
See whether the address is valid, deliverable or risky, the provider type, MX status, and disposable or role flags. Sign up free to unlock the full deliverability score, risk score, and catch-all detection.
Syntax and format validation
We check the address against email formatting rules to catch typos, missing @ symbols, illegal characters, and malformed domains. This is the first and fastest filter for obviously invalid addresses before any network checks run.
MX record and domain lookup
The verifier queries the domain's DNS to confirm it has valid MX records and can actually receive mail. A domain with no mail server cannot accept email, so this instantly rules out addresses that will hard bounce.
SMTP mailbox check
We connect to the receiving mail server and verify the mailbox without sending a message. This confirms deliverability where the server responds, helping you separate live inboxes from addresses that no longer exist.
Disposable and role-based flags
The tool flags throwaway addresses from temporary email services and role-based prefixes like admin@, sales@, or noreply@. These often signal low-value or shared contacts that raise complaint and bounce risk.
Who uses this tool
Reduce email bounce rates
Email marketers verify addresses before a send to remove invalid and risky contacts. Fewer hard bounces protect your sender reputation, improve inbox placement, and keep you in good standing with mailbox providers and your ESP.
Clean and dedupe contact lists
List cleaners and data teams run addresses through the verifier to identify dead, disposable, and role-based contacts. A clean list lowers sending costs and gives you accurate engagement metrics you can actually trust.
Validate emails at signup
Developers check addresses in real time during registration to block typos, fake signups, and disposable domains. Catching bad emails at the point of entry keeps your database clean and your transactional mail deliverable.
Qualify sales and RevOps leads
Sales and RevOps teams verify prospect emails before outreach so reps spend time on reachable contacts. Premium lead and B2B intelligence add provider type and risk context to help you prioritize the best accounts.
Frequently asked questions
How do I verify an email without sending one?
Enter the address into the tool and it checks the email without sending anything. It validates the syntax, looks up the domain's MX records, and performs an SMTP handshake with the mail server to confirm the mailbox exists. You get a deliverability read instantly, with no test email and no risk to your sender reputation.
Is this email verifier really free?
Yes. You can verify single addresses for free with rate limits, no credit card needed. The free result shows valid syntax, deliverable status, provider type, MX presence, and disposable or role-based flags. Signing up unlocks 1,000 free lookups with full deliverability and risk scoring, plus API access for verifying lists in bulk.
What is a catch-all email address?
A catch-all domain is configured to accept mail sent to any address at that domain, even mailboxes that do not exist. This makes individual addresses hard to verify, because the server accepts everything during an SMTP check. Catch-all detection in the paid plan flags these domains so you can treat those addresses as uncertain rather than confirmed.
Does email verification reduce bounce rate?
Yes. Removing invalid and undeliverable addresses before you send is one of the most effective ways to lower hard bounces. High bounce rates damage your sender reputation and can land mail in spam or get your domain blocked. Verifying your list first keeps bounces low and protects long-term inbox placement, though no verifier guarantees zero bounces.
How accurate is the email checker?
The verifier combines syntax checks, MX lookups, and SMTP mailbox checks for a reliable result on most addresses. No email verifier is 100 percent accurate, however. Catch-all domains, greylisting, and servers that mask responses can make some addresses uncertain. Use the deliverable, risky, and uncertain signals to make informed decisions rather than treating any result as absolute.
What is the difference between free and business addresses?
Free addresses come from consumer providers like Gmail, Yahoo, and Outlook, while business addresses use a company's own domain. The tool reports provider type so you can tell consumer contacts from corporate ones. This matters for B2B targeting, lead scoring, and spotting personal addresses where you expected a verified work email.
Can I verify a whole list of emails at once?
The free tool checks one address at a time. To verify an entire list, sign up for 1,000 free lookups and use the 1Lookup API or bulk verification to process thousands of addresses programmatically. Bulk results include full deliverability scores, risk scoring, catch-all detection, and B2B intelligence for each contact.