New Step by Step Map For https://first2host.co.uk/blog/install-exim-email-and-dovecot-on-ubuntu-and-debian-servers/
Run sudo /etc/init.d/exim4 restart and Guantee that the service stops and commences correctly. In the event the assistance is not able to restart, a little something likely went Mistaken if you edited the passwd.customer file.
If this performs you already know the firewall is not the difficulty.