As of March 20th, 2018, we no longer allow paravirtualized/container setups (e.g. OpenVZ containers or LXC).
Our solution works well on both physical and/or hypervisors that use full virtualization. Please ensure to install the native stable Debian 10 image, without any security customizations. Our engineers will fully secure the environment as part of the installation process.
A Spam Experts managed server must be able to be rebooted without the host system "interfering" in this in any kind of way. So it’s critical that files such as “/etc/hostname”, “/etc/hosts” and “/etc/resolv.conf” are not modified when the system is rebooted, as that will break the filtering of the system. Typically in full virtualization this should not be the case.