Exim4 :: Change default port
:: How to change Exim4 default port on Linux Ubuntu
+ change port
vi /etc/default/exim4
change on this line:
SMTPLISTENEROPTIONS='-oX 26:587:10025 -oP /var/run/exim4/exim.pid'
+ apply configuration
update-exim4.conf /etc/init.d/exim4 restart