How to install a local mail server or switch between mail servers in Plesk for Windows?
Plesk allows to install MailEnable Standard Edition using Plesk Installer. Other supported mail servers (see Windows: Mail servers in Plesk Software Requirements) are not shipped with Plesk - they should be downloaded from their official websites and installed manually. For more information, visit this documentation page.
Go to Tools & Settings and click Updates and Upgrades (Plesk).
On the Updates and Upgrades page, click Add/Remove Components.
On the Add/Remove Components page, select MailEnable Standard Edition for installation
Click Continue to begin the installation.
Connect to a Plesk server via RDP.
Start a command prompt as an administrator and install MailEnable mail server:
C:> plesk installer --select-release-current --install-component mailenable