The SecureMail Gateway is an extremely efficient, lightweight server. It only uses about 6GB of disk space for the OS and all software. Because it operates on top of CentOS 6 linux, it also doesn't utilize a lot of CPU or memory resources. It can be installed in virtually any VMware or Hyper-v virtualization environment.
SecureMail Gateway virtual machine requires the following recommended minimum
resources when run within your VMware Infrastructure. Please note that these
values are rough guidelines and may need adjusting depending on the host
infrastructure hardware, average email volume, etc. Please contact email@example.com if you have
questions regarding allocating the proper amount of resources:
Attached is the the "Pre-Installation Checklist" that also details the network port requirements and general VM configuration details.