Accounts on MAILVIO are split into two. An account comprises a Company and Users.
When you create a new account, we automatically create a Company with a user associated with it.
A user can manage multiple companies. A company can have multiple users associated with it.
All this sounds confusing, but what it really boils down to is that when you log in to MAILVIO you can associate yourself with multiple companies, each of which has its own settings, campaigns, templates, etc. This is really useful for people who manage email marketing on behalf of multiple companies.
You can switch users as you like by clicking the "Switch" button at the top of any page on the Control Panel.