E-mail Shredder for Outlook - Version 1.0 SafeIT E-mail Shredder for Outlook is a software application for permanently removing (shredding) old and deleted e-mails from your Outlook Personal Storage (.PST) file. Selected e-mails will be shredded along with all the unused space in your PST-file. This includes discarded e-mails, fragments of previously deleted e-mails and old attachments.