This app is so useful. I had to get used to the fact that it runs so quietyly in the background that you don't really know that it is working; yet, every time I check to see if yesterday's emails were, in fact, achived... there they are! So rock solid that I've taken to routinely deletely all emails from Mail that are more than 3 months old... in fact, I believe that I could reliably change that to all emails that are more than 3 hours old. All your emails are in a great searchable database including attachments that are searchable is so many ways. And, as per another reviewer, the whole Mail app, if not the whole Mac itself, runs faster and smoother since installing MailSteward. So of the best money I've ever spend on software.