Introduced in release: 7 Update 4 patch 26
mailboxpurgedelay Message Store option When a mailbox is deleted by the end user, expunge all the messages and purge the data after
store.cleanupage has expired. Expunged messages can be restored with '
mboxutil -R'. Expunged messages are moved to the new location when a mailbox is renamed.
The default value is: 0