Protect email deliverability
Remove addresses that are likely to bounce before they affect your sender reputation and future inbox placement.
Verify Email Address — Free Email Verification Tool
Use free email verification to check whether an email address is correctly formatted and configured to receive mail. Review syntax, domain, MX records, mail-server availability, and available mailbox signals before you send—without sending a message to the address.
Why verify email addresses?
Reduce bounces before they damage your sender reputation
Email verification checks more than whether an address looks correctly formatted. It examines the domain, DNS and MX configuration, mail-server availability, and any mailbox signals the receiving server makes available. Together, these checks help determine whether an address is deliverable, undeliverable, or needs further review before you send.
Verifying addresses before a campaign helps remove malformed and inactive contacts, identify disposable inboxes, and separate uncertain results from addresses with stronger delivery signals. A cleaner email list reduces avoidable bounces, protects sender reputation, and gives marketing and sales teams more reliable campaign data.
Keep contact data clean
Identify invalid domains, temporary inboxes, role-based addresses, and other list-quality signals before they enter your CRM.
Avoid wasted sends
Spend email credits and outreach time on addresses that have a realistic chance of receiving your message.
How email verification works
Email verification works in layers. It begins with syntax and domain checks, continues through DNS and MX records, and then examines mail-server and available mailbox responses. No message is delivered during the process. When a receiving server hides mailbox information or accepts every address, the result remains inconclusive instead of presenting an unsupported delivery conclusion.
Parse the address
Check the local part, domain, length, characters, and overall structure against standard email formatting rules.
1Resolve the domain
Confirm that the domain exists and has the DNS configuration required to receive email.
2Find the mail server
Inspect MX records and test whether the receiving mail server is available for incoming delivery.
3Read mailbox signals
Review SMTP and available mailbox responses to determine whether the individual address appears deliverable, undeliverable, catch-all, or inconclusive.
4What does the email verifier check?
An email verification result combines several independent signals. Format, domain, MX, SMTP, mailbox, disposable-address, catch-all, and address-type checks are shown separately so you can see which signals support the final delivery result.
Email syntax and format
Checks the username, domain, length, permitted characters, and overall structure. A valid format is required, but format alone cannot confirm that the mailbox can receive email.
Domain and MX records
Confirms that the domain exists and publishes mail-exchange records capable of routing incoming messages to a mail server.
Mailbox and SMTP signals
Uses available SMTP and mailbox responses to assess whether the individual inbox can receive mail. Some mail servers deliberately withhold this information.
Address and delivery signals
Shows disposable, role-account, catch-all, forwarded, disabled, spam-trap, and full-inbox signals when they are present in the verification result.
How to interpret email verification results
Email verification should lead to a clear next action. The final result summarizes the available delivery evidence, while the individual checks explain which signals produced that result.
Deliverable
The address has valid syntax, a working domain and mail server, and available signals that support delivery. These addresses can normally remain in the sending list.
Not deliverable
One or more decisive checks failed, such as invalid syntax, a missing mail domain, unavailable MX records, a disabled address, or a rejected mailbox. Remove or correct the address before sending.
Needs review
The address may receive email, but a disposable inbox, catch-all configuration, full mailbox, spam-trap signal, or another delivery-related condition requires closer review.
Inconclusive
The receiving server did not provide enough information to confirm the individual mailbox. Retry later or review the address separately instead of automatically treating it as valid or invalid.
Use the result in your sending workflow
A deliverable result is strong evidence that the address is ready for normal sending, but it should still be used with permission-based email practices. A not-deliverable result points to a decisive failure and should be corrected or removed before the next campaign. Keeping these outcomes separate prevents known bad data from repeatedly entering your email platform.
Needs-review and inconclusive results deserve a separate path. They may reflect a catch-all domain, temporary server response, full inbox, or another condition that does not prove permanent failure. Review the source of the address, retry when appropriate, and decide how much uncertainty your workflow can accept. This preserves potentially useful contacts without treating every uncertain mailbox as safe to send.
Email verification for clean lists and safer sending
Use email verification whenever an address enters an important workflow: before importing contacts, launching an email campaign, starting a sales sequence, or accepting a new signup. Checking early prevents low-quality addresses from spreading through marketing platforms, sales tools, and CRM records.
Email marketers
Verify newsletter and campaign lists before sending. Separating undeliverable, disposable, and inconclusive addresses helps reduce bounce rates, avoid wasted sending volume, and keep campaign reporting based on contacts that have a realistic chance of receiving mail.
Sales and outreach teams
Run email verification before adding prospects to an outreach sequence. Reps can spend more time on usable contacts and avoid repeatedly sending to malformed addresses, unavailable domains, or mailboxes that return decisive delivery failures.
Signup and lead forms
Check submitted addresses before they enter product accounts, lead pipelines, or CRM records. Syntax, domain, disposable-address, and mailbox signals help identify data that needs correction or further review.
Email validation vs. email verification
Email validation and email verification are often used interchangeably, but they represent different levels of checking. Validation examines whether an address is structurally correct. Verification continues beyond format to assess whether the domain, mail server, and available mailbox signals support delivery.
Step 1
Email validation checks the format
Email validation confirms that an address follows formatting rules, such as having a valid local part, an @ symbol, and a properly formed domain. It can detect malformed input and common typing mistakes, but it cannot determine whether the domain accepts mail or whether the individual inbox exists.
Step 2
Email verification checks deliverability
Email verification includes format validation and then examines DNS, MX records, mail-server availability, SMTP responses, and other available mailbox signals. The result provides a stronger assessment of whether an address can receive email, while preserving an inconclusive state when the receiving server does not disclose enough information.
Start free. Upgrade when your list grows.
Start free, then choose 5,000 or 10,000 monthly verification credits with no daily limit and API access.
Free
$0
For occasional checks and smaller email lists.
- Batch email verification
- Up to 50 verifications per day
- Up to 10 email addresses per batch
- Verification results and CSV export
Recommended
Pro
$19.90/month
For regular list cleaning and product workflows.
- Batch email verification
- No daily verification limit
- Up to 100 email addresses per batch
- Verification results and CSV export
- 5,000 verification credits every month
- Bonus 2,000 long-term verification credits
- API access
Advanced
$29.90/month
For larger lists and higher-volume verification.
- Batch email verification
- No daily verification limit
- Up to 100 email addresses per batch
- Verification results and CSV export
- 10,000 verification credits every month
- Bonus 5,000 long-term verification credits
- API access
Email verifier frequently asked questions
Understand what the checker can confirm, how free limits work, and why some email servers return an uncertain result.