[Exim] main config options in exim

Hi guys,

I put docs of exim up side down but didnt find any description of the
following which is in update-exim4.conf.conf

1. So could anyone describe what each of the following means

dc_eximconfig_configtype=
dc_other_hostnames=
dc_local_interfaces=
dc_readhost=
dc_relay_domains=
dc_minimaldns=
dc_relay_nets=
dc_smarthost=

2. What other similar parameters could be added here and what is their
description?
3. How could I make exim4 relay outgoing emails to the world and incoming
emails to designated email server in the LAN?

Thank you in advance.

neural



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