Sophos Xg Email Configuration, I don't have a local mail server. We would like to show you a description here but the site won’t allow us. (are they just the same as I figured I had missed something, but I just assumed the XG default rules would handle my use case; like the SG did. e. 2. A mail relay is an SMTP server configured in such a way that it allows specific users, user groups, or hosts to relay (i. yourdomain. i've setup a firewall rule to allow those ports inbound to my mail server in DMZ. Please reference the following pocket guide and KBA's: Protect Cloud hosted Email Server-MTA Mode Sophos XG Firewall: How to configure Email Protection in MTA mode Sophos XG Firewall v17: How Nov 14, 2025 This topic explains how to set up Microsoft 365 to route email through Sophos Gateway. Part 1 walks you through the configuration of inbound mail routing.