[Exim] Newbie

Hi,

I want to realize this:

mails form provider-pop3 via fetchmail:
aaa@??? -> /var/mail/aaa
aaa@??? -> /var/mail/aaa
bbb@??? -> /var/mail/bbb
all other -> /var/mail/other

mail from localnet (10.0.0.0/24):
ccc (without Domain) -> /var/mail/ccc
all other adress without Domain -> /var/mail/local
aaa@??? -> /var/mail/aaa
aaa@??? -> /var/mail/aaa
bbb@??? -> /var/mail/bbb
all other (including xxx@???) -> provider-relay. (I hope, I dont need a own DNS.)

Until now I study spec.txt, man-page and the example-exim.conf but I dont find a useable startingpoint.

Maybe, my need is so simple, that you can send me a exim.conf for that. :-)

If it's not so simple:
Can you advice me how to start?
Do I Need the /etc/aliases?
Do I Need a DNS?

My Version is 3.12 on a Debian 2.2r4.

Regards
Konrad Mader