There are four login levels in Plesk with each level having its appropriate roles and responsibilities:

Administrator (for dedicated server user) – The highest individual server level login which allows web hosting administrators to set up and manage all system items. Multiple servers can be centrally managed with the Master level login of Plesk Expand.

Client/Reseller – Second tier login account where the users are given domain creation (end user) rights from the System Administrator. Clients/Reseller can administer to groups of domains using a single login.

Domain Owner(End Customer) – These are third tier individual domain owner accounts with predetermined permission sets and interface for single domain administration.

Mail User(Indipendent Email user) – This is the fourth tier individual mail account which allows the user to log in to their own private interface and manage passwords, spam filters, anti-virus settings and much more.