Emails are still being sent after turning them off


I am testing for users with certain domain names, to turn off the email notifications. I went to the Profile > Settings page and unchecked the email boxes (right).

However, the email is still getting sent out (left). You can see that an error is being thrown due to the mail server not being setup and trying to send out the email.

Are there other settings that I am missing?

I am sending the email by going to Administration > Members > Email Members > Registered Members, and the version I am using is