Host is hosted under a project on the provider hetzner.de login by sshkey only.
Directadmin is a piece of software designed to be a single point of administration interface. It is preferable above webmin/usermin but its also not-free.
The Admin user is the only user on a system-level. Direct admin is only used to care about email / mailing lists currently.
DirectAdmin can also host websites.
The email is configured to accept only email from @itgilde.nl