Facebook’s announcement yesterday of a new Groups feature caught a lot of people by surprise.

Even more surprising, though, was the discovery that you could be signed up for a Group without knowing about it – and that your inbox would promptly start filling up with notifications every time someone posted, well, pretty much anything.

You work hard to keep your inbox free of clutter, right? So run, don’t walk, to your Facebook notification settings (pull down the “Account” menu in the upper right hand corner, and then choose the “Notifications” tab), and disable any of these email notifications you don’t want to receive:

Facebook group settings

You can click the “Change email settings for individual groups” link if you’d rather tweak your preferences group-by-group.