===== Identification of e-mails in the subject line =====

All e-mails sent via the TrutzBox are automatically encrypted by the TrutzBox. If the recipient is a TrutzBox (and thus the mail address ends with @comidio.email), then the TrutzBox automatically obtains the required public key of the recipient. If the recipient does not have a TrutzBox (and therefore a normal e-mail address has been addressed), the TrutzBox administrator must first inform the TrutzBox of the public key of the recipient. For security reasons, it is not possible to send an e-mail to a recipient if the recipient's public key is unknown.<br/>