ImapBox at all post offices in the name of the directory you created is the same. So you can easily find the location of their own data storage.
The data stored in the post office is the most stable since the birth of the global Internet storage place, you do not have to worry about the data there will be any possibility of lost in the post office.
f you the ImapBox mailbox management interface, delete the mail account, there will not be any change in your mailbox account corresponding to the post office space. Only in the local client no longer have this EMAIL account join. It means that you no longer use this account corresponds to the space to store the data.