Email List Cleaner

About this Email list cleaner

Upload a CSV of email addresses, click Validate, and download a cleaned CSV you can safely use. Our email list cleaner removes invalid addresses after a series of checks, flags disposable domains, catches typos, and (optionally) verifies recipients via a non-sending SMTP handshake. It’s fast, online, and completely free. Want to leave the invalid addresses in the list and manage it yourself? Try our Email list validation tool.

How to use

• Upload the list you want to clean in CSV format.
• (Optional) Toggle Deep check (SMTP) for server handshake validation.
• Click Validate. Results appear in the table.
• Export CSV—cleaned of invalid addresses and annotated with results.

What we check

• Syntax – Checks proper email format (name@domain).
• Domain & DNS – Confirms the domain exists and resolves.
• MX records – Verifies the domain can receive mail.
• SMTP handshake (optional) – Checks if the mail server accepts the recipient (no email is ever sent).
• Disposable domains – Flags temporary email providers.
• Common typos – Suggests corrections (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 teams choose this email list cleaner

• Accuracy you can see – Layered checks (Syntax → DNS → MX → optional SMTP) minimize false results.
• 100% free, online – No paywalls, no credit throttles, no install.
• Optional deep SMTP – high-confidence results without sending email
• Actionable output – download a cleaned CSV you can use right away

FAQ

• What is an email list cleaner?
  A tool that scans your email list to remove invalid or risky addresses and fix obvious mistakes, improving deliverability and protecting your sender reputation.
• Does this tool send any emails?
  No. Even with Deep check (SMTP) enabled, the tool does not send any emails.
• Will it catch disposable or temporary mailboxes?
  Yes. Known disposable domains are flagged and excluded.
• Can it catch typos automatically?
  Yes. It catches typos and suggests corrections.
• What if I’d like to just perform the validation and keep invalid addresses in the list?
  You can use our Email list validation tool . It runs the same checks (Syntax, Domain/DNS, MX, optional SMTP, disposable, typo detection) but doesn’t remove anything. Instead, it adds result column so you can keep your list intact and decide what to do later.

Glosary

• DNS – Domain Name System. The system that translates human-readable domain names into IP addresses and serves other records that direct internet traffic.
• MX record – A DNS record that specifies which mail servers handle email for a domain
• SMTP handshake – he opening exchange in email delivery where client and server greet (HELO/EHLO), advertise capabilities, optionally secure the connection, and authenticate before transmitting mail.
• Disposable domains – Temporary, throwaway email domains used for short-lived addresses.