Kevin, who created your smpl account, is currently receiving all of your spaces notification emails. You can now save Kevin from getting all the emails by changing your notification email setting.
Head over to Settings -> Details, and you will find the notification email field. Change that to the correct person who should receive all the notification emails for your whole space, and save Kevin from all of those emails.
You're welcome, Kevin.
P.S. Kevin is purely fictional, and any resemblance to your Kevin is purely coincidence.
Pro-Tip. If you want this to go to multiple people you can create rules and/or filters for that in your email settings. If you use gmail, here's how to do it.