Setting up users on the Server is required before they can send and receive email. All user functions are accessed by first clicking the "Users" button on the main menu bar. This displays a summary of all the users on your Server in a Compact or Detailed display.
In addition to normal users, there are four reserved user names used by the Server. The system administrator has the reserved user name admin. Any email delivered to admin can be collected using either POP3 or IMAP using the system administrators login name and password in the normal way. Also, any email delivered to postmaster or root is redirected to the admin mailbox.
The fourth reserved name is "Badmail". If a user or mailing
list with this name is set up, all email that has a valid domain, but
an unrecognized user name, will be delivered to it.