https://first2host.co.uk/blog/install-exim-email-and-dovecot-on-ubuntu-and-debian-servers/ Fundamentals Explained
Deal with: Try to deliver An additional mail to remote mailbox. After that it seems that all missing mails seem magically in Dovecot mailbox.Your ISP or hosting supplier received’t block incoming connection to port 25 within your server, which suggests you are able to acquire emails from other mail servers. Having said that, several ISP/hosting s