Check an email address before you send. Sendzovo evaluates address, domain and mail-server signals to help identify deliverable, risky or undeliverable email addresses.
One free email verification for visitors. No account required.
A properly formatted address alone does not mean an email can receive mail. Sendzovo combines multiple available signals to provide a more useful verification result.
The checker first evaluates whether the address has a valid email structure before performing additional checks.
Domain and MX information helps determine whether the address belongs to a domain configured to receive email.
Available mail-server and verification signals help classify the address as deliverable, risky, uncertain or undeliverable.
Invalid or poor-quality addresses can create unnecessary bounces and make recipient data less reliable. Checking an address before sending can help you make better decisions about the email addresses you collect.
Email verification runs a series of checks, from the cheapest to the most revealing. An address has to pass each step before the next one is worth running.
The address must follow the rules for email addresses: one @ sign, a valid local part and a valid domain. Typos like a missing dot or a double @ are caught here, before any network check runs.
The domain must exist and publish MX records that say which mail servers accept its email. A domain without a mail server cannot receive messages, so any address on it is undeliverable.
The checker connects to the domain's mail server and asks whether it would accept mail for that mailbox, without sending a message. The server's answer is the strongest signal of whether the address exists.
Even a working address can be a poor recipient. The checker also flags catch-all domains, disposable providers, role-based and no-reply addresses, and whether the mailbox is on a free or business domain.
Every check returns one of four results, plus the signals behind it.
The mail server confirmed it accepts mail for this address. It is safe to send to.
The address may receive mail, but something lowers confidence: a catch-all domain that accepts every address, or a disposable inbox that will soon disappear. Send with care, or ask the person to confirm.
The syntax is invalid, the domain has no working mail server, or the mailbox does not exist or is disabled. Sending to it will bounce, so remove it.
The mail server did not give a clear answer, often because of anti-spam protection or a temporary error. Try again later before deciding.
These addresses often pass basic checks but still cause problems. Knowing which is which helps you decide how to treat them.
Some domains accept mail for any address, real or not. The server says "yes" to everything, so a specific mailbox cannot be confirmed. Messages may still bounce later or go unread.
Temporary inboxes people use to get past a sign-up form. They work for a few minutes or hours, then disappear, which makes them a common source of fake accounts and future bounces.
Addresses like info@, support@ or sales@ belong to a team rather than a person. They are often shared, more likely to report email as spam, and a poor fit for personal messages.
Addresses like noreply@ are designed to send, not to receive. Mail sent to them is usually discarded, so they should not be on your recipient list.
Checking one address by hand is useful, but the biggest gains come from verifying automatically at the right moments.
Verify addresses as users register, to stop typos and disposable inboxes before they reach your database and to keep password resets and receipts deliverable.
Sendzovo can verify a recipient just before a message goes out, so known-bad addresses are skipped automatically instead of bouncing and hurting your sender reputation.
Addresses go stale as people change jobs and close accounts. Verify older lists in bulk before you send to them again.
Sendzovo evaluates available address, domain, mail-server and verification signals to estimate whether an email address appears suitable for sending.
Yes. Visitors can perform one free email verification without creating an account. Create an account to continue using Sendzovo's email verification tools.
No. Verification provides useful signals about an email address and its mail environment, but it cannot guarantee that a future message will be delivered.
A risky or uncertain result means the available signals are not strong enough to treat the address as clearly deliverable. You may want to review the address before using it.
A mailbox can fill up, be closed, or start rejecting mail after it was checked. Verification reflects the moment of the check, which is why verifying again before sending to older addresses helps.
A domain whose mail server accepts mail for every address, whether or not the mailbox exists. Because the server never rejects an address, a specific mailbox cannot be confirmed, so catch-all results are marked risky.
Yes. With a free Sendzovo account you can verify lists of addresses from the dashboard, and use the Email Verification API to check addresses from your own application.
Yes. The Sendzovo Email Verification API returns the same result and signals as this checker. See the Email Verification API documentation for endpoints and code examples.