I work as a system administrator for Linux, OpenBSD, Cisco, PaloAlto systems - mostly in the field of security. The company I work for hosts for its customers email using exim (I’m not very good in postfix, yet, but learning). I started with email in the 90s running a bbs system people had to dial into using modems and ever since hosted my own mailservices for friends and familiy. Moved to yunohost, because my own setup (exim, mysql, lxc, vserver, kvm) on a machine shared with some friends (the kvm part) has become impossible to maintain for me (time, father of five) and I hoped that there’d be an active community around yunohost that would support my new mailsystem and that I could give something back sometimes.