The remote host may give an attacker information useful for future attacks.
The remote host has the VRFY command enabled. An attacker may use it to enumerate valid accounts on this host and gain more information about them.
Disable this option in your MUA configuration file.
Try Tenable.io free for 60 days. Protect your organization from WannaCry, NotPetya and other ransomware cyberattacks. Get Started
The cookie settings on this website are set to 'allow all cookies' to give you the very best website experience. If you continue without changing these settings, you consent to this - but if you want, you can opt out of all cookies by clicking below.