1. メイル/mutt
http://www.mutt.org/ The Mutt E-Mail Client
http://www.mutt.org/download.html downloading Mutt
neomutt https://neomutt.org/
color
https://github.com/morhetz/gruvbox/wiki/Terminal-specific
The current stable public release version is 1.14.7.
As of 1.6, Mutt has switched away from the dev/stable versioning scheme. Going forward, version numbers will be incremented based on the significance of the release.