Configuring Mail essentials 5 as a mail relay server After you have installed Mail essentials 5, you have to configure it as a mail relay server. To set this up, follow these steps More: Step 1: Configuring Mail essentials to receive mail Step 2: Configuring Mail essentials to forward received mail to your mail server Step 3: If installing on mail server machine – change mail server port. Step 4: Configuring Mail essentials to send out mail. To set-up a smart host: Step 5: Configuring your mail server to relay mail via Mail essentials