You've just migrated your mailboxes to the Office365. But what to do with copiers & printers which don't want to work with Office365 account, because they don't allow to use TLS? Or how to send error or information events from your servers if you are using simple SMTP send? Answer is - install SMTP server feature! I will show you how to do this using 2012R2 server as a relay for SMTP. First: you need to install SMTP on the server 1. Go to server manager, click Add roles and features and select SMTP Server feature. Standard installation is simple -after clicking 'Next' several times and 'Finish' in the wizard you will have SMTP server installed on your machine. 2. Go to the Server Manager again and click Tools: Internet Information Services (IIS) 6.0 Manager . SECOND: configure SMTP server properties 3. Click on the [SMTP Virtual Server #1] and right click for properties 4. In the General tab in IP address section, select Advanced... : Here you can conf...