Free Email Verifier.

The ZeroBounce email checker includes your own API key, allowing you to integrate our verifier service with your favorite platforms, websites and landing pages. Depending on your email service, you can rapidly import your list for verification or check emails within their native platform. Check out our full list of

supported integrations

.

Our free email verifier tool will never cost you anything. Feel free to enter as many of your contacts’ email addresses as needed to find out which are valid or invalid. If you want to check emails in bulk, fill in social data,

score your most active contacts

, or use our

real-time API

, you’ll need ZeroBounce credits. Every email address you need to check consumes one credit, and your purchased

credits will never expire.ⓘ

For anyone sending out email campaigns regularly, we recommend verifying your email contacts at least once a quarter (every 3-4 months). This helps you stay on top of any new leads you may obtain and identify previously valid addresses that are now unused or dormant. If you use our email verification API, you may be able to extend your cleaning schedule to once every six months. A real-time email checker helps stop fake or fraudulent addresses like disposable emails at the gate so that they never enter your email database.

Email address verification is the process of determining if an email address is valid and active or invalid. It ensures that email addresses provide optimal deliverability. This process is vital for businesses to verify that the addresses they gather through sign-up forms or maintain in their mailing lists are capable of receiving messages.

Valid addresses exist and are currently in use on the associated email server, while invalid addresses don't exist or follow the incorrect email format. By verifying email addresses, businesses can minimize bounces and maintain a strong sender reputation with email service providers.

No. Whenever you send an email message, the sending server first delivers an EHLO message. This is a Simple Mail Transfer Protocol (SMTP) command that requests confirmation of the user identity on the recipient domain. Once it confirms the identity, it then delivers the message. When verifying an email, the verification tool only sends the EHLO message.

An API (Application Programming Interface) is an integrated software that allows two applications to communicate. A real-time email checker API is an integration that allows you to verify emails as someone enters them into your sign-up forms. Your email verification service should provide you with an API key so that you can install the email checker API on your website or landing pages. This proactively keeps email lists clean by blocking invalid addresses.

Yes. The email verifier identifies valid and invalid addresses, as well as other several risky email types, including spam traps.

You can boost your inbox placement with the following tactics:

An email verifier, or email checker, detects the validity of an email address. It’s essential to use email checker tools like email verifiers to determine if your contacts are valid and safe to keep on your email list. Any invalid email addresses are nonexistent or outdated and will result in a bounce. An email verifier protects you from bounces and preserves your sender reputation.

You can check to see if an email is valid by using a bulk email checker or real-time email verification. The service uses a series of syntax-related and SMTP checks to determine if the email address is correctly formed and actively in use. If the email address passes the email verification checks, it’s classified as a valid email.

There are a variety of techniques you can use to check the validity of an email address. However, an email address verification tool is the simplest and most effective method. Professional email address verification services offer single email verification, bulk email verification, and real-time email verification via an API connection. All you need to do is provide an email address, and the email validation service will determine if it’s valid or invalid within seconds.

Email verification involves a series of checks to determine the validity of an email address. These checks include the following:

• A syntax check (determines if there are typos or malformed characters)

• DNS record check (must contain a valid MX or A-Type record)

• Spam trap check (checks the address for known spam signatures)

• SMTP check (looks for a response from the email domain)

If the email address fails any of these checks, it’s invalid. If it passes each check, it will undergo additional testing to determine if it has other outstanding issues. The email address may be valid, but it may also be an abuse email, on a global suppression list, from a disposable domain, or a catch-all email. If the email address falls into any of the categories mentioned above, it’s classified as such. If it passes all additional checks, the email address can be deemed valid.

Real-time verification is a process to check the validity of an email address as it’s entered into a field. The email verifier determines if the address is valid and accepts or rejects the data based on the email verification results. Real-time email verification is most commonly used via an API connection between an email validation service and another platform. For example, websites typically use real-time email verification on their newsletter signup and registration forms to block invalid email addresses from being submitted.

Leveraging advanced email verification tools like ZeroBounce can be highly effective. These tools assess whether an email address is valid, invalid, or risky, greatly reducing the chances of sending emails to addresses that could bounce. This includes filtering out disposable and non-existent email addresses.