This free e-mail notification service provides orders, opinions, and press releases. Subscribers can choose which they want to receive.
SCOTUSblog
This is the feed from the Supreme Court Of The United States blog, a site which provides in-depth information about court decisions as well as commentary and analysis on those decisions.
You can sign up for this free e-mail service from the Cornell Law School and it will send you the syllabi of U.S. Supreme Court decisions in bulletin format within hours of their release.