I'm trying to setup SophosXG as a MTA for internal clients to bounce mail off of. My ISP has a mail server that I need to authenticate to. I was able to set this up in UTM by using transparent mode with a smarthost+authentication.
How do I do this in XG?
Mail flow (outoing only): LAN Client -> SohposXG -> ISP Smarthost (auth) -> Internet
I've setup the device to allow e-mail from all my internal subnets under "Allow Relay from Hosts/Networks" and I can successfully send mail to the device. It then says "Email has been accepted by Device and queued for scanning." in the log. Under Administration -> Notification settings I setup my external e-mail server (ISP) with authentication and I can send test e-mail without any problems.
I'm only using my device for DNS, DHCP and Web Protection. It has only one interface (LAN). I'm using PBR to get 80/443 traffic to the device. It has a static IP of 192.168.4.254 and a gateway of 192.168.4.1.
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