Mtr command is not working through commnd line interface. It is available in help menu. But it is not available to run.

mtr    Network diagnostic tool that combines functionality similar to
              traceroute and ping

Login to command line through SSH using admin.

run command mtr

server_name> mtr
-rbash: mtr: command not found
 

Symantec is aware of the issue, and we will be removing this in upcoming release of Symantec Messaging Gateway. And we will be removing this from help Menu.

Please utilize traceroute or ping as a alternate.