How I built Heimdall, an open-source personal email guardian.

<a href="https://medium.com/@fabianterh/how-i-built-heimdall-an-open-source-personal-email-guardian-68e306d172d1″ title=”https://medium.com/@fabianterh/how-i-built-heimdall-an-open-source-personal-email-guardian-68e306d172d1″ class=”link link_untco”>medium.com/@fabianterh/ho…