Sophos XG in MTA Mode with multiple WAN Gateways


I would like the XG to send the emails it receives from the email server as outgoing emails over the second WAN interface.

I proceeded according to the following article:

However, Sophos completely ignores this and the mails are still sent via the WAN1 gateway.

Does anyone else have an idea?


Edited TAGs
[edited by: emmosophos at 12:22 AM (GMT -7) on 3 Jun 2021]