Verify if your mail server greeting (HELO/EHLO) is valid and matches rDNS.
HELO/EHLO Checker tests the first handshake of your SMTP server for compliance and security leaks.
Validates FQDN in greeting
Checks for internal hostname leaks
Verifies rDNS matching
Validates greeting hostname format and match quality
Flags private hostnames exposed in SMTP banners
Connect multiple emails, Automate emails, manage replies, and track results all in one inbox.