See comment of August 26, 2019 at 12:13 pm at https://ryan.buterbaugh.org/better-qmail-on-ubuntu/ by Ryan Buterbaugh:
I believe this is a bug with runit – the /var/lib/supervise directory is no longer being created as part of the package install. There are two options here: Install daemontools-run instead (prior to installing qmail), since it’s an alternative supervisor for qmail and appears to be working properly Create the /var/lib/supervise directory manually (prior to installing qmail) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1929293 Title: qmil-run sets up the wrong symbolic links so qmail won't start To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubiquity/+bug/1929293/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs