Stop emailing of greetings?

Members are complaining about the emails everytime someone friends or sends them a greeting.

How can I stop this?

I can't find it under Privacy Settings is there a way in the back end.

Hello, you need delete button "send greeting" from sys_objects_actions table via your phpmyadmin

Is that the only way?

There isn't a check box somewhere?

As I know greetings was hard coded in dolphin