6,000+ Integrations
How MailClean Works
Our cloud-based verification engine runs multiple checks in fractions of a second to deliver 99% accurate results.
The Validation Process
STEP 1
Formatting & Syntax
RFC-compliant validation against IETF standards including RFC 5321, RFC 5322, and more. Supports quoted strings, comments, domain literals.
STEP 2
Domain, DNS & MX Check
Validates DNS records, checks MX entries, and identifies invalid, non-working, or parked domains.
STEP 3
Mailbox Confirmation
Confirms the specific mailbox exists using SMTP emulation — without ever sending an email to the recipient.
STEP 4
28+ Additional Checks
Disposable email detection, spam trap removal, catch-all detection, role account flagging, and much more.
We Never Send Emails
Your contacts will never receive an email from MailClean. We verify mailbox existence without sending any messages.
Your Data Is Safe
Military-grade encryption, ISO 27001 certified data centers, and automatic data deletion. Your lists are never shared or sold.
All Verification Features
The most comprehensive email verification engine available
Advanced Syntax Verification
Checks against all pertinent IETF standards with support for internationalized addresses.
Domain & DNS Check
Validates DNS records and identifies addresses with invalid or parked domains.
Mail Exchanger (MX) Test
Identifies emails without valid mail exchangers, including legacy configurations.
Mailbox Confirmation
Confirms mailbox existence via SMTP emulation without notifying the recipient.
International Verification
Supports non-Latin alphabets including Chinese, Arabic, Cyrillic via Unicode and Punycode.
Catch-All Detection
Identifies mail exchangers that accept all emails indiscriminately.
Temporary Unavailability
Detects over-quota or temporarily unavailable mailboxes with automatic retries.
Role Account Detection
Flags generic addresses like sales@ or info@ that aren't tied to real individuals.
Yahoo! Verification
Full support for Yahoo's complex mail exchangers across all regional domains.
Disposable Email Check
Identifies temp addresses from Mailinator, YOPmail, EmailOnDeck, and thousands more.
Spam Trap Removal
AI-powered detection of spam traps, honeypots, and habitual spam reporters.
Free Email Detection
Flags addresses from Gmail, Yahoo, Hotmail, Outlook, and other free providers.