Incident Management sending EMAIL problem

Dear Solman Gurus,

We are using Sap Solman 7.1 incident management,

As screen shot maintained below. When i try to open a message there 3 options to use incident system. When i choose "Incident(VAR)(SMIV)" and "Support Message(SLFN)"not send automatic EMAIL.

But when i choose "Incident(VAR) V (ZMIV)" it sends EMAIL related to ticket owners. How can i activate sending EMAIL features for others ?

I need your help

Regards