I have lost my PGP private key
All the e-mails stored on our servers that have been encrypted by their senders using your public key can only be decrypted into plain text using your matching private key.
We don’t hold any ‘spare’ keys here at mailbox.org, and we therefore have no way of restoring your e-mails to plain text. Were we able to do so, this would in fact be a sign that the encryption wasn’t fulfilling its intended purpose.
Take care to backup your private key.