Set up Roundcube Install and configure Apache and PHP on your email server. Instead of creating a separate storage device for the web server data: store the data in /home/www and use a symbolic link from /var/www to point to it. Only allow access to your web server via HTTPS. Choose whatever means you like to accomplish this. Get the latest "Complete" package from the Roundcube website. Decompress the files (and move them if need be) so that the root of your https://email.youruserid.ops3455.cat goes straight to Roundcube. Follow the instructions in the INSTALL file in the package. Look at /var/log/httpd/ssl_error_log if you're having problems. The keywords php-xml and php-mbstring should be helpful for you. Create a database inside your existing ops345db "instance". . Similar to what your did for Nextcloud: you'll need to create a database inside ops345db, and a new user and password. Complete all the needed fields in https://email.youruserid.ops3455.ca/installer Alter your config.inc.php so that Roundcube doesn't attempt to use encryption to connect to your SMTP server on localhost: $config['smtp_server'] = 'localhost: 25'; $config['smtp_user'] = ''; $config['smtp_auth_type'] = ''; Delete the installer directory after you've tested that everything works and you made your screenshots. Send an email from Roundcube to youruserid@youruserid.ops345.ca