$ sudo apt-get update
$ sudo apt-get install mailutils-comsatd 

mailutils-comsatd is installed in your system.

Make ensure the mailutils-comsatd package were installed using the commands given below,

$ sudo dpkg-query -l | grep mailutils-comsatd *

You will get with mailutils-comsatd package name, version, architecture and description in a table

mailutils-comsatd package basic information: