Can email notifications be opt in rather than opt out?

Can email notifications be opt in rather than opt out?

Could you please make it so that email notifications are opt in for users and not opt out? We may have to stop using Zoho. Some of my colleagues like and use it; others don't want to experience the details of project management—they just want to be updated verbally at meetings. Sure, they can configure their own settings, but why do I have to make them do that? Many will just say: make this stop; I don't care if it means that you have to stop using this tool. I guess I could give the an alias email address, but why the workaround? This is especially annoying when you are getting a project up and running and have to enter many tasks all at once. The members of the project are immediately inundated.