The Local quarantine uses your local file system to store quarantined emails and a SQLite database as an index. Stored quarantined email files, as well as database files, are encrypted for security reasons. These files are located under C:\ProgramData\ESET\ESET Mail Security\MailQuarantine (on Windows Server 2008 and 2012) or C:\Documents and Settings\All Users\Application Data\ESET\ESET Mail Security\MailQuarantine (on Windows Server 2003).
Local quarantine features:
•SPAM and quarantined email messages will be stored in a local file system, not an Exchange mailbox database.
•Encryption and compression of locally stored quarantined email files.
•Quarantine reports can be sent to a specified email address using a scheduled task.
•Quarantined email files removed from the quarantine window (after 21 days by default), are stored in a file system (until automatic deletion occurs after a specified number of days).
•Automatic deletion of old email files (after 3 days by default). For more information see File storage settings.
•You can restore removed quarantined email files using eShell (assuming that they've not been deleted from the file system yet).
•Inspect quarantined email messages and decide to delete or release any of them. To view and manage locally quarantined email messages, you can use Mail Quarantine manager from the main GUI or Mail Quarantine Web interface.