Hello, Debian 10 ISPConfig Version: 3.1dev single Nginx We are here of course a bit at the border between the server and the setting of the DNS zones. I can not find anything specific in the documentation. I declared a my-site.tld mail domain per site my-site.tld. How to set the e-mail on ISPConfig and what value to put in the MX DNS zone (and possibly CNAME and others ?) to be able to receive and send the messages from a messaging software, for example Thunderbird?