HowTo: Whitelisting CyberHoot’s Mail-Relay IP Address – Mimecast Posted on February 19, 2020May 8, 2020 by Ty Mezquita This HowTo video will walk you through how to whitelist CyberHoot’s Mail-Relay IP Address in the email system of Mimecast. The required IP address and Domain name information is found in this HowTo article:CyberHoot Email-Relay IP Addresses, Domains, and White-Listing Articles Share this on your social networks. Help Friends, Family, and Colleagues become more aware and secure.