Email List Validation

About this Email list validation tool

This fast, free, online Email list validation tool lets you validate email addresses in bulk. Upload a CSV, start validation, and export the original file with a new status column. Want to remove invalid contacts instead? Try our Email list cleaner.

How to use

• Upload a CSV with email addresses you want to validate.
• (Optional) enable Deep check (SMTP) for a server handshake.
• Click Start list validation. Results appear in the table.
• Export CSV to share or manage your list.

What we check

• Syntax - Proper email format (name@domain).
• Domain & DNS - Domain exists and resolves.
• MX records - Domain can receive mail.
• SMTP handshake (optional) - Mail server accepts the recipient without sending a message.
• Disposable domains - Flags temporary inbox providers.
• Common typos - Catches mistakes such as gmial.com instead of gmail.com.

What the results mean

• Valid - Overall status for this address.
• No Typo - No common domain or format mistakes detected.
• Not Disposable - Not from a temporary email service.
• Has MX - Domain publishes MX records and can receive mail.
• SMTP Passed - Server accepted the address during handshake.
• Fail Reason - Why validation failed or why the address is risky.

Why validate your list?

Invalid and risky emails cause hard bounces, hurt deliverability, and damage sender reputation. Validating the list before you send helps more messages land in the inbox.

• Lower bounce rate
• Better inbox placement
• Higher engagement
• Protected domain and IP reputation

Why choose this email list verification tool?

• Free bulk email validation
• Optional SMTP check for higher confidence
• Simple CSV upload and export
• Clear statuses and reasons you can act on

Who benefits from this Email list verification tool?

• Marketing ops cleaning legacy lists before a campaign.
• Sales teams verifying leads from events or external sources.
• Product and growth teams checking new sign-ups.
• Founders and indie hackers protecting sender reputation.

Email list validator vs. cleaner: what is the difference?

Validator (this tool): Runs the checks and lets you download your original CSV with a new status column. Each address is marked valid or invalid, so you can filter or manage the list however you prefer.

Cleaner: Uses the same checks, but downloads a filtered CSV with invalid email addresses removed. Try our Email list cleaner.

FAQ

• What is email list validation?
  It is the process of checking whether emails in your list are real, deliverable, and safe to send to. The checks include syntax, DNS/MX, disposable domains, common typos, and optional SMTP verification.
• Is SMTP checking safe?
  Yes. We perform the SMTP check without sending any email to the address.
• Does validation improve deliverability?
  Yes, indirectly. By finding invalid and risky addresses before you send, you reduce bounces and other negative signals that can hurt sender reputation.
• What if I only need to validate one email address?
  Use our Email validator for one-off checks. Paste the address, run validation, and get the result immediately.
• Email list validator vs. cleaner: what is the difference?
  Validator marks every row as valid or invalid and lets you download the original CSV with a new status column. Cleaner uses the same checks, but downloads a filtered CSV with invalid addresses removed.