[Exim] relay-question about hosts_treat_as_local

Hi,

I asked this a time before but did not get an answer:
I want to accept and relay for another host (lets say mail.example.net)
without having to specify each and every domain this host has. I found
"hosts_treat_as_local = mail.example.net" could be useful for this, but
I'm not sure about any other effects this could have. Maybe somebody os or
can tell me if this is even suitable for what I want to do.


--
regards, Jakob