Struggling with DKIM signing

[Damian]

> The submission service still exists, so I should:
> 1 - get rid of the 127.0.0.1:10026 but from master.cf.
> 2 - in master.cf change the submission line "-o content_filter=smtp-amavis:[127.0.0.1]:10024" to "-o 
> content_filter=smtp-amavis:[127.0.0.1]:10028" (just to avoid 10026 for now)
> 3 - in amavis 50-user add:
>        $inet_socket_port = [10024,10028];  # listen on two ports
>        $interface_policy{'10028'} = 'ORIGINATING';
> 
> And that should do it?

Yes. You should see "ORIGINATING" as part of the "Passed CLEAN" log line, and no more "...OpenRelay".