Meta-data are also problematic. We are working on a solution for that, but it won't be included directly in our first version.
It will probably come for free with updates. Our idea is that for every email you send, your box randomly sends ten encrypted fake-emails, at random moments, at ten random addresses. Recipients server automatically sees that it is a fake email when it decrypts it, and automatically drops it.
Meta-data are also problematic. We are working on a solution for that, but it won't be included directly in our first version.
It will probably come for free with updates. Our idea is that for every email you send, your box randomly sends ten encrypted fake-emails, at random moments, at ten random addresses. Recipients server automatically sees that it is a fake email when it decrypts it, and automatically drops it.