Yes, you can manage access to the web interface for individual e-mail recipients (e-mail users) under "Users & Permissions" > "Manage email users". They can log into the system administration (https://login.europeanmx.eu) with their e-mail and password and manage their own settings. Adding and removing email users does not affect current email processing; this page is only used to manage individual accesses to the admin panel.
Under "Users & Permissions" > "Manage permissions" you can define which menu items are to be available to an e-mail user. Each menu item can be accessed via 4 possible HTTP methods.