[Dovecot] Expunge deleted messages older than X days for all users ?

Hi,

I'm currently migrating to Dovecot-based IMAP server for a ~200 users environment. Clients are Outlook 2003/2007, Thunderbird 3.x and various mobile clients.

1. What I want to accomplish is to allow the users to delete a message (then the message is moved to "Trash"), then when they empty/delete that message from Trash, it will be kept somewhere on the server for X days, and the user could recover that message in some way.

Is that at all possible with Dovecot?

2. Also, how can I automatically expunge the emails that the user deleted from their deleted items folder ? What if users don't EXPUNGE by themselves ? What do you do in that case?

Thanks, Bar.