[Pkg-exim4-users] Configuring incoming mail to smart host

[johnbakel at punt.nl]

I'm trying to configure this:
* accept all mail for mydomain.example from Internet; 
* deliver that mail to mail.otherdomain.example, without a MX record;
* no relaying any other mail, from any IP; 
* no local delivery, no local sending.

Host mail.mydomain.example has A and MX record for mydomain.example.
internal host server.otherdomain.example has a public A record, but no MX record for mydomain.example.

conf.conf:
dc_eximconfig_configtype='satellite'
dc_other_hostnames='mydomain.example'
dc_local_interfaces=''
dc_readhost='mail.mydomain.example'
dc_relay_domains='mydomain.example'
dc_minimaldns='true'
dc_relay_nets=''
dc_smarthost='mail.otherdomain.example'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='true'
dc_mailname_in_oh='true'

RCPT TO: <test at mydomain.example>
550 Unrouteable address

How should I set parameters to make it work?

Thanks

John