exim4 configuration questions and answers
we assuming your computer is named 'tux' and is on your domain 'home.net'
and that your internet service provider mail computer is 'isp.mail'
adjust these assumpions as appropriate in what follows.


exim4: simple configuration for home use
the '#' symbol means that you are running as the administrator of your computer.

run: # dpkg-reconfigure exim4-config

you'll see these questions and can use the suggested answers.

  mail sent by smarthost; received via SMTP or fetchmail       (select this)
  system mail name:                                            home.net
  IP-addresses to listen on for incoming SMTP connections:     127.0.0.1
  Other destinations for which mail is accepted: tux.home.net; tux
  Machines to relay mail for:                                  (leave empty)
  IP address or host name of the outgoing smarthost:           isp.mail
  Hide local mail name in outgoing mail?                       yes
  Visible domain name for local users:                         home.net
  Keep number of DNS-queries minimal (Dial-on-Demand)?         yes
  Delivery method for local mail:                              mbox format in /var/mail/
  Split configuration into small files?                        no