How long deleted items are retained depends on the type of account and how it is configured. For IMAP accounts, you can edit the account settings to automatically delete after a certain interval or you can use the Schedules tool to schedule automatic deletes For Exchange accounts you can use the Schedules tool to schedule automatic deletes For POP accounts, you can edit the account settings or use the Schedules tool to schedule automatic deletes IMAP - to schedule automatic permanent deletion of items in your Deleted Items folder in an IMAP account you may do one of the following: Edit account settings Go to Tools > Accounts Select the Mail tab, highlight your IMAP account, and click Edit Under the Edit Account menu, click the Advanced tab Under Delete options choose how you would like your messages to be deleted Use Schedules Go to Tools > Run Schedule > Edit Schedules Name the schedule For "When," choose something other than manual and configure,
No matter how sophisticated the technology is , It still takes people !