Real-Time Physical SMTP Handshakes & Hard Bounce Diagnostics
Safeguard your critical domain reputation and comprehensively calculate your exact outreach risk by physically validating email addresses in real-time. Completely bypassing flawed estimations and mock protocols, we execute live MX record validation and genuine, physical SMTP handshakes directly against target servers, executing exact command sequences (EHLO -> MAIL FROM -> RCPT TO -> QUIT) to instantly flag 550 User Unknown errors without ever sending a real email. Guaranteeing absolute technical accuracy with strictly real-time operations and zero simulated data, our high-performance backend rigorously cross-references global databases to filter out self-destructing disposable addresses, actively flags uncertain Catch-All domains, and securely isolates low-engagement role-based inboxes, flawlessly protecting your ISP standing from devastating hard bounces.
High bounce rates destroy your domain reputation. Enter an email address to verify its syntax, check for MX records, detect "Catch-All" configurations, and simulate a deep SMTP handshake to verify the mailbox actually exists.
Every time you send an email to a non-existent address, your "Hard Bounce" rate increases. ISPs monitor this heavily, and a bounce rate above 2% will route your future emails to spam.
RCPT TO command. If the server replies with 550 User Unknown, we instantly flag it as a hard bounce.admin@, info@, or sales@ are often distributed to multiple people, leading to high spam complaint rates. We flag these as risky for cold outreach.EHLO -> MAIL FROM -> RCPT TO -> QUIT). We never issue the DATA command, meaning no email is actually sent.Your feedback has been submitted successfully. We appreciate your help in improving our tools.