There are 3 or more ways that can be followed to successfully install SMTP service on Windows Server 2008 R2. Most administrators use the ‘Server Manager’ GUI to achieve this. In addition to the GUI, you can also use the ‘servermanagercmd’ commandlet or Windows PowerShell to accomplish same task. For the purpose of this post I will install SMTP service using PowerShell. 1. Installing SMTP Components and Features – Click on Start → All Programs → Accessories → Windows PowerShell → Right-click on Windows PowerShell → click on Run as administrator – Enter the following command ‘powershell.