Postfix: configure a mail relay (MTA) on Ubuntu

In this tutorial, I will explain to you how to install (it’s the easiest) and configure Postfix on Ubuntu as an email relay to send emails from applications, equipment (copier, switch, etc.). This type of server is often used in businesses to send emails from different equipment and software, even if you have an internal …

Read more



Exchange: send emails externally from a connector

In this tutorial, I will explain how to configure a receive connector to send emails outside your organization from Exchange. You have already configured a receive connector on Exchange in order to be able to receive e-mails from applications, copiers or any other devices. Now you need to send mail to external addresses (gmail.com, outlook.com …

Read more



Sophos XG configure a DHCP relay

relay added

Présentation A DHCP relay is a service that listens for DHCPDISCOVER frames to transfer them to a DHCP server. The DHCP relay avoids installing a DHCP service by network segment (MPLS, VLAN …). Before configuring the relay firewall, the DHCP service must be an IP range for the segment where the relay will be configured. …

Read more



Exchange: create a Receive connector

Presentation In this tutorial, we will see how to set up a Receive connector on Exchange to allow devices (copiers / firewall …) and applications to send email addresses to mailboxes that are hosted on Exchange. Creating the connector 1. Open the ECP interface and go to Mail Flow 1 / Receive Connectors 2 and …

Read more