You may use the mailbox.org Guard to read PGP encrypted emails in the webinterface.
- Enable the mailbox.org Guard in Settings -> Guard Security Settings and set a password.
- Replace the auto-generated keys with your own PGP keys.
To be able to read your PGP encrypted emails in the webinterface, you have to upload your private key to our server. You may think about the question, if it is safe to upload your private key on our server. The administrators of mailbox.org are NOT able to get access to your private key.