Infrastructure recommendations
Installation of the roles on different servers
We recommend that you install the components involved on different servers. This has two decisive advantages:
- Enabling high availability of your email infrastructure.
- You thus increase the security of your email infrastructure, as you can locate the Gateway Roles and web portals in a demilitarised zone (DMZ).
A distribution of the components could look as follows:
NOTE: In larger environments with high email volumes, you have the option of installing several servers with gateway roles in the DMZ. This way you can build a highly available system.
TIP: Detailed information on the communication between the components can be found under Port allocation.
Installation on a single server
You can install all components involved on one server. This can be useful for small environments.
WARNING: The installation of all components on a single server may have a negative effect on the availability and security of your email infrastructure.