The folder auto-clean feature in SmarterMail is designed to help system administrators keeping mailbox size(s) under control. Using folder auto-clean, common folders like the Junk E-mail, Sent Items and Deleted items can be regularly purged of old messages so they do not clutter user mailboxes. System administrators can configure folder auto-clean to allow users and domains to override suggested settings or to require them to follow set policies.
Follow these steps to configure the folder auto-clean feature at the system level:
Follow these steps to enable the folder auto-clean settings on the domain level, if the system administrator has allowed it: