[exim] Debian+exim4+multiple domains

I'm looking for a good howto on this. Hints appreciated.

I want a setup were each domain has it's own alias file and I also want
mailman lists for all domains. Only the primary domain should deliver to
local users, the rest should only deliver according to its alias file and
mailman setup (I think the mailman setup has it covered already).

--
Bjørge Solli
"Computers are like airconditioners, they don't work properly when you open
windows..." (unknown)