Install librt-extension-commandbymail-perl by entering the following commands in the terminal:
sudo apt update sudo apt install librt-extension-commandbymail-perl
Description:
Allow RT status and other commands by email
CommandByMail allows commands to be sent to the Request Tracker in emails. These are similar to those used by debbugs and allow tickets to be closed, reassigned, moved between queues and other commands.
Version: 3.00-1
Section: universe/misc