====== Computer Setup - Exim4 ======

<code bash>
vi /etc/default/exim4 
vi update-exim4.conf.conf

update-exim4.conf

vi exim4.conf.template

systemctl restart exim4.service 

netstat -tulpn|grep 25

most /var/log/exim4/rejectlog
most /var/log/exim4/paniclog
most /var/log/exim4/mainlog
most /var/log/mail.err
most /var/log/mail.log
</code>