## postfix container

Runs postfix container.

https://mxtoolbox.com/domain/

## runit

runit - a UNIX init scheme with service supervision.

- http://kchard.github.io/runit-quickstart/
- http://smarden.org/runit/runsv.8.html
- http://smarden.org/runit/sv.8.html
- http://smarden.org/runit/chpst.8.html