All Site News, Future Update Announcements, Requests and Suggestions goes here.
To disable Updates Email, you just need to edit your email preferences. Here's how:

1.Go to the My Groups page
2.Click the My Email Preferences link in the upper right corner of the page the email preferences page for Yahoo! Groups.
3.Click Edit next to the email address you want to disable the message for.
4.Uncheck the Send Daily Updates Email box.

Alternatively, you can simply click the "Unsubscribe from Email Updates" link that appears at the bottom of each Updates email.