While there is already a year-old feature request in the ISPConfig bugtracker (http://bugtracker.ispconfig.org/index.php?do=details&task_id=3748), I find this issue so important that I post it here as well for further discussion. If you support this suggestion, don't forget to vote for it in the bugtracker as well! Let's Encrypt (https://letsencrypt.org/) aims to become the first free, automated, and open CA (certificate authority) that will issue certificates for websites through an automated system. When it goes into service later this year, it will allow website owners and web hosts to start serving over HTTPS immediately, without the costs, unnecessary time and hassle of using the current CA systems. I think both the philosophy (free and open) and the automated, easy-to-use nature fits the ISPConfig project well, therefore I'd like to vote for it's inclusion in the next release!