https://first2host.co.uk/blog/install-postfix-email-server-on-ubuntu/ No Further a Mystery
The file “/and many others/postfix/principal.cf” defines most configuration configurations linked to Postfix. The command “postconf” will demonstrate helpful in enhancing it. The primary edit is shifting the variable “home_mailbox” to “maildir/” as a result of the next command.and leaving the default values in by just hitting enter