We are using Microsoft Exchange 2007 with all of the latest service packs and hotfixes. We have a managed mailbox for spam that we have setup so e-mail is automatically deleted when it is over 30 days old. This gives us time to review the spam in case we miss any that are falsely flagged as spam and are instead legitimate important e-mail. We have the storage group for this spam mailbox configured so the retention time for deleted e-mail is only one day to prevent our Information Store being needlessly full of deleted spam. The problem is Exchange 2007 seems to not be able to purge e-mail folders, or the e-mail contained within them, that are in the root of "Deleted Items". The managed mailbox policy produces a folder called "InBox" in "Deleted Items" that contains the spam that is older than 30 days. Those e-mails nvever get purged according to the configured retention time on the storage group. We have to instead manually deleted them. This prevents a fully-automated e-mail management system. Does anyone know how to get the configured retention time of a storage group to act on folders, or is this a bug in Exchange 2007?