I want to know whether possible to hide internet header of outgoing emails. I found out how to hide internal IP Address, but I want to hide or virtually change if possible the domain name example: mx.domain.com to mx.seconddomain.com. The best would be to hide both name, and public IP if possible.
We are using four external different domain names, and we don't want them to show in IP header real name our internal domain.
Thank you for any input