To install Exim4 you run the following commands at a terminal prompt: <screen>

<command>sudo apt-get install exim4</command>

<command>sudo apt-get install exim4-base</command>

<command>sudo apt-get install exim4-config</command>

</screen> Once exim4 is installed, the configuration files are stored in the <filename>/etc/exim4</filename> directory. In ubuntu, by default, the exim4 configuration files are split across different files. You can change this behavior by changing the following variable in the <filename>/etc/exim4/update-exim4.conf</filename> file: <placeholder-1/>