<h2>Hardware</h2> <ul> <li>Any modern CPU,</li> <li>1 GB RAM,</li> <li>30 GB storage space (i.e. e-mail/attachment storage),</li> <li>100 Mbit/s Ethernet port.</li> </ul> <blockquote> <blockquote> <blockquote> <blockquote> <p><strong>NOT SUITABLE FOR ENTERPRISE LEVEL USE</strong>; these requirements are calculated to sustain a load of about 20 users simultaneously (more may technically still function, but performance might decline exponentially with additional load)!</p> </blockquote> </blockquote> </blockquote> </blockquote> <h2>Software</h2> <ul> <li>Operating system (e.g. <a href="https://www.debian.org/">Debian</a> / <a href="https://www.raspbian.org">Raspbian</a> / <a href="https://www.freebsd.org">FreeBSD</a>),</li> <li>Text editor (e.g. <a href="https://www.vim.org/">Vim</a> / <a href="https://www.nano-editor.org/">Nano</a>).</li> </ul> <h2>Network</h2> <ul> <li>Stable broadband internet connection,</li> <li>Static public IP address that is not <a href="https://mxtoolbox.com/blacklists.aspx">blacklisted</a>,</li> <li>Firewall <a href="https://mailguide.woosting.nl:8443/requirements/firewall-settings">port forwards</a>,</li> <li>Domain name registration (e.g. 'example.org') along with the <a href="https://mailguide.woosting.nl:8443/requirements/dns-registration">required DNS records</a>.</li> </ul> <blockquote> <blockquote> <blockquote> <blockquote> <blockquote> <blockquote> <p>A Rasbian equipped <a href="https://www.raspberrypi.org/">RaspberryPi 2</a> (€35,- at the moment of writing) should able to provide the hardware requirements (a <a href="https://www.raspberrypi.org/">Turris Omnia</a>, with Debian equipped <a href="https://github.com/CZ-NIC/turris-os/releases">LXC containers</a> was used to write this guide though)!</p> </blockquote> </blockquote> </blockquote> </blockquote> </blockquote> </blockquote> <!-- REFERENCES -->