A tool for creating standard Symbian IMAP mailbox for the Symbian phone. Usually the mailbox wizard creates the mailbox that use Nokia proxy between the IMAP/POP server and the phone. Also the internal implementation is different which makes several things to work differently. Also 3rd party application cannot easily access to the mailboxes.
This tool use old Symbian APIs to create a mailbox that does not use any hidden proxy servers.
One example of 3rd party apps that needs Symbian mailboxes is Lock Screen.