What is “nmh” Package?

The new version of the MH mail handler
For more details: http://www.nongnu.org/nmh/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install nmh.

  brew install nmh

Now, use nmh!