Not sure how to configure - instructions were ambiguous (to me)

I wanted to send an email to every user of a certain role when content was published of a certain type.

For instance:

I have a role, "Content moderator".
I have a content type: "News"
When a piece of "News" content is published, I want an email sent to all "Content moderator" users.

I installed and enabled the module. I then proceeded with the configuration:

1. Select the content types: News
2. Enable on content update: unchecked
3. Content status: Only notify for published content
4. Select roles (Please select the roles for which email notifications should trigger on content insert/update): I assumed I would select, Content moderator, but wasn't sure, as below there was a place to select as well?
5. Email Recipients (Please select the roles to whom you want to send email, please remember to select roles in a way so that total user count should not be greater than 50.): Content moderator
6. Email Settings: defaults

So, I have "Content moderator" selected in 2 places; instructions were ambiguous on #4 (Select roles)

I created a News node; checked mail; nothing. Ran cron (wasn't sure if required); nothing.

P.S. I have more than 50 moderators. Is there a way around that? If not, is this module not viable?

Thank you.