You cannot use milter-manager with Ruby 2.4.3. It's known issue. It has been fixed in Ruby 2.5.0 and https://github.com/ruby/ruby/tree/ruby_2_4 If you want to cherry-pick the patch see https://github.com/ruby/ruby/commit/3d4a397354fd8d27c5eb91ca5c3bd7afe9b11af0#diff-7875e170ada1a2b62a8c8798729afa11
pkg info gettext-runtime-0.19.8.1_1 GNU gettext runtime libraries and programs glib-2.50.3_1,1 Some useful routines of C programming (current stable version) indexinfo-0.3.1 Utility to regenerate the GNU info page index libedit-3.1.20170329_2,1 Command line editor library libev-4.22,1 Full-featured and high-performance event loop library libffi-3.2.1_2 Foreign Function Interface libiconv-1.14_11 Character set conversion library libunwind-20170113_1 Generic stack unwinding library libyaml-0.1.6_2...
Segmentation fault (core dumped)
milter manager: milter manager 2.0.9 Released