Captive mailbox in Cyrus IMAP?

[Mike]

On Tue, 21 Nov 2006, Nik Conwell might have said:

> We're currently using UW IMAP and have previously implemented a hack  
> whereby accounts (based on shell name) are designated captive.  For  
> these accounts, any SELECT of any folder is overridden to SELECT a  
> read-only shared mailbox with a single e-mail that tells them they're  
> captive and what they need to do to get out of the situation.  To the  
> client it looks like you've lost all your e-mail and you only have a  
> single message.  In reality, the e-mail is still there and delivery  
> continues to work.  Getting them back to their normal mailboxes is a  
> quick/easy operation.
> 
> Is there any way to do a similar thing in Cyrus IMAP?  I'm not  
> against coding it but I wanted to see if there was a conventional way  
> of doing this first.

Why do you do this?

Mike