You do not need to delete messages from your quarantine. All messages are automatically deleted after 35 days. You can, however, manually delete messages from your quarantine if you like. To delete a quarantined message:
1. Click the Messages tab.
2. Select one or more messages to delete. To delete more than one message:
• Use Shift+Click to select adjacent messages.
• Use Ctrl+Shift to select non-adjacent messages
3. Click the Delete icon. The messages are deleted.