Hi everyone!
In my home lab running Sophos XG Home I've configured Email running as MTA using O365 as smarthost. (I'm using the MX endpoint as smarthost FQDN per this description). This setup has worked for years, somehow it broke and I'm unable to find the solution.
While the smarthost hostname nicely resolves to the required e-mail addresses, every e-mail fails in the Spool with "R=smart_host_route T=smarthost_smtp defer (113): No route to host DT=0.005s
"
For the life of me I'm unable to figure out why?! Even looking at the log via the console doesn't get met any info.
The firewall log, nor the Email log does not show any activity regarding this.
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