Email List Validation

About this Email list validation tool

This fast, free, online Email list validation tool lets you to validate your email addresses in bulk. Upload a CSV, click Validate, and get instant results you can export to manage your list. Your validation results also appear in the table above—neatly organized—so you can copy/paste them or validate more email addresses as needed. Want to remove invalid contacts too? Try our Email list cleaner.

How to use

• Upload a CSV with email addresses you want to validate.
• (Optional) check Deep check (SMTP) for a server handshake.
• Click Validate. 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 (no message sent).
• Disposable domains – Flags temporary providers.
• Common typos – Catches mistakes (e.g., gmial.com → 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 (can receive mail).
• SMTP Passed – Server accepted the address during handshake (only when deep check is on).
• Fail Reason – Why validation failed or why it’s risky (e.g., no MX, invalid syntax, disposable, catch-all).

Why validate your list?

Invalid and risky emails cause hard bounces, hurt deliverability, and tank sender reputation. Our email list validator finds and fixes problems before you send. So more emails land in the inbox, and fewer land you in trouble.

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

Why choose this email list verification tool?

• Completely free — bulk-validate emails at no cost
• Optional deep SMTP — high-confidence results without sending email
• Best-in-class UX — upload CSV, click, done
• Clear and actionable results — clear statuses + reasons + suggested fixes

Who benefits from this Email list verification tool?

• Marketing ops — clean legacy lists before sending a campaign.
• Sales representative — verify leads from events or scraped sources
• Product & growth — validate new sign-ups and identify fake accounts
• Founders & indie hackers — protect sender reputation

Email list validator vs. cleaner — what’s the difference?

Validator (this tool): Runs the checks (syntax, DNS/MX, optional SMTP, disposable, typos) 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 as the validator, but when you download the CSV it’s already filtered—only valid email addresses are included. No extra sorting or formulas needed. Try our Email list cleaner.

FAQ

• What is email list validation?
  It’s the process of checking whether emails in your list are real, deliverable, and safe to send to (syntax, DNS/MX, optional SMTP).
• Is SMTP checking safe?
  Yes. We perform the SMTP check without sending any email.
• Does validation improve deliverability?
  Yes, indirectly. By removing invalid/risky addresses you lower your bounces and negative signals.
• What if I only need to validate one email address?
  You can use our Email validator for single checks. Just type in an email you want to validate and click Validate button. It’s quick and handy for one-off validations. If you have a few addresses, you can repeat the single check.