The https://first2host.co.uk/blog/install-exim-email-and-dovecot-on-ubuntu-and-debian-servers/ Diaries
It runs in /var/operate/dovecot/auth-customer and you may see its ownership there. For those who have set it to "mail" or related You will probably need to alter it to Debian-exim so Exim can study and write to the socket.If this operates you are aware of the firewall isn't the difficulty. So we are able to dig deeper. Install tcptraceroute and tra