A very interesting project, I applied for a mailbox, but I found it didn't have a password recovery mechanism, and I don't think it's very good.
The main task of our service is to provide maximum security & cryptographic protection to all our user's messages. In this case, the
password is the only and the most important key to all the stored information. You should be aware, that all the services, providing a "password restore" feature
knows your password, and therefore, can access all your data. Our architecture excludes any possibilities of data access without the private key of data owner.
Even we, the owners of the service can't access any of your data, including meta data, messages subject, attached files, settings, even folder's names. And we do not afraid that any of the stored information will be stolen or got by third-party, because its just a trash mashup. But we pay a lot of attention to our servers availability, up-time and response speed, until all the data will be decentralized (see our roadmap). And in this case, the members should care of only one thing that is important - their password strength and safety.
This is the same situation like with your cryptocurrency wallet - will you ever lost the password from it or let someone knows it? We think not.