external connection

[jmmmagalhaes]

I'm doing some tests with mta-zone and directadmin.
I intend to allow zone-mta installation to accept external connections from a specific server with direct admin. How can I do it?
I already changed the "host" in "interfaces/feeder.toml" from host="127.0.0.1" to host="0.0.0.0" but the connection is still refused.
Also in exim from directadmin i have "route_list = * zone-mta_server_hostname::2525" but can't connect.
Can anyone give me a hand? maybe i'm making a mistake easy to detect but after more than two days looking for the problem and answers i still haven't been able to solve.

Thanks