$ sudo apt-get update
$ sudo apt-get install dhis-mx-sendmail-engine 

dhis-mx-sendmail-engine is installed in your system.

Make ensure the dhis-mx-sendmail-engine package were installed using the commands given below,

$ sudo dpkg-query -l | grep dhis-mx-sendmail-engine *

You will get with dhis-mx-sendmail-engine package name, version, architecture and description in a table

dhis-mx-sendmail-engine package basic information: