delayed delete_mode question

[Patrick Goetz]

I didn't know about the delayed delete_mode option until finally taking 
the time to comb through the man pages in detail.

This seems like a very useful feature, but I'm not sure I understand how 
it's implemented.  Say some user deletes a message or folder.  Does s/he 
have immediate access to the deleted mailboxes hierarchy so that they 
can restore the deleted message/folder themselves, or does this require 
administrator intervention?  If the former, does the deleted hierarchy 
show up automatically, or do they have to subscribe to it?