I started looking in to use of OpenSMPTD for a mail server and have installed it from Debian packages.
In the process of reading a blog article by the current developer I discovered the upstream is now at version 6.6.2p1+ after some serious security issues were discovered by SSL Labs (Qualys). Note that Debian 10 is only at version 6.0.3p1! See the source at: https://github.com/OpenSMTPD/OpenSMTPD I would like to install from source but I wonder if that is such a smart move, especially when we now use systemd and the source is set up with the traditional GNU automake system and I don't see any provision for systemd. I don't grok systemd very well and usually rely on others for the proper setup. I have asked for help on the OpenSMTPD mailing list, but I suggested my first effort would be to use the systemd setup used by the Debian installation (with appropriate renaming). I haven't received an answer yet. Opinions? Thanks. -Tom