Can templates be deleted so that nothing is sent out when the corresponding action takes place. For example, on one my lists, two or three messages go out whenever someone subscribes, the standard welcome message, the $SIGNUP message, and the "Output of your job" message, if it's an anonymous request. I'd like to narrow this down to one or two messages. Can I delete the standard welcome message? I saw a delete button at the bottom of the web interface for this template but I wasn't sure of its purpose. Thanks!