wiki

http://www.debianhelp.co.uk/eximtips.htm

root@linuxdeb:/etc/exim4# cat update-exim4.conf.conf
# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'
#
# Please note that this is _not_ a dpkg-conffile and that automatic changes
# to this file might happen. The code handling this will honor your local
# changes, so this is usually fine, but will break local schemes that mess
# around with multiple versions of the file.
#
# update-exim4.conf uses this file to determine variable values to generate
# exim configuration macros for the configuration file.
#
# Most settings found in here do have corresponding questions in the
# Debconf configuration, but not all of them.
#
# This is a Debian specific file

dc_eximconfig_configtype='smarthost'
dc_other_hostnames='linuxdeb.maildomain.org'
#dc_local_interfaces='127.0.0.1 ; ::1'
dc_local_interfaces='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='mailgw.mydomain.lu'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='false'
dc_mailname_in_oh='true'
dc_localdelivery='mail_spool'

root@linuxdeb:/etc/exim4# update-exim4.conf

If you change the template located in /etc/exim, then reload the file : update-exim4.conf.template

As Exim is only use as client in our example, then we can stop the service exim which is used only for SMTP relay.

Now test your config:

root@linuxdeb:/etc/exim4# sendmail -v mymail@maildomain.org < /etc/motd
LOG: MAIN
  <= linuxdeb.maildomain.org U=root P=local S=622
 delivering 1XhgnJ-0008RI-Qu
R: smarthost for mymail@maildomain.org
T: remote_smtp_smarthost for mymail@maildomain.org
Connecting to mailgw.mydomain.lu [10.1.1.22]:25 ... connected
  SMTP<< 220 mailgw.mydomain.lu ESMTP Exim 4.69 Fri, 24 Oct 2014 17:28:49 +0200
  SMTP>> EHLO linuxdeb.maildomain.org
  SMTP<< 250-mailgw.mydomain.lu Hello linuxdeb.maildomain.org [192.18.20.77]
         250-SIZE 104857600
         250-PIPELINING
         250-AUTH LOGIN
         250 HELP
  SMTP>> MAIL FROM:<linuxdeb.maildomain.org> SIZE=1658
  SMTP>> RCPT TO:<mymail@maildomain.org>
  SMTP>> DATA
  SMTP<< 250 OK
  SMTP<< 250 Accepted
  SMTP<< 354 Enter message, ending with "." on a line by itself
  SMTP>> writing message and terminating "."
  SMTP<< 250 OK id=1XhgnJ-0006wE-S6
  SMTP>> QUIT
LOG: MAIN
  => mymail@maildomain.org R=smarthost T=remote_smtp_smarthost H=mailgw.mydomain.lu [10.1.1.22]
LOG: MAIN
  Completed

Now you can configure the aliases, so all mails will be redirected to your mailbox

root@linuxdeb:/etc/exim4# cat /etc/aliases
# /etc/aliases
mailer-daemon: postmaster
postmaster: root
nobody: root
hostmaster: root
usenet: root
news: root
webmaster: root
www: root
ftp: root
abuse: root
noc: root
security: root
root: mymail@maildomain.org
root@linuxdeb:/etc/exim4# sendmail -bi

Check errors in /var/log/exim4/mainlog or rejectlog

root@linuxdeb:/etc/exim4# cat /var/log/exim4/mainlog

To check an Exim config file:

exim -C <config_file> -bV

http://www.datadisk.co.uk/html_docs/exim/commandline.htm